The testing of the acuity of the sense of hearing to determine the thresholds of the lowest intensity levels at which an individual can hear a set of tones. The frequencies between 125 and 8000 Hz are used to test air conduction thresholds and the frequencies between 250 and 4000 Hz are used to test bone conduction thresholds.
Measurement of hearing based on the use of pure tones of various frequencies and intensities as auditory stimuli.
A form of electrophysiologic audiometry in which an analog computer is included in the circuit to average out ongoing or spontaneous brain wave activity. A characteristic pattern of response to a sound stimulus may then become evident. Evoked response audiometry is known also as electric response audiometry.
The audibility limit of discriminating sound intensity and pitch.
Hearing loss in frequencies above 1000 hertz.
Conditions that impair the transmission of auditory impulses and information from the level of the ear to the temporal cortices, including the sensorineural pathways.
Objective tests of middle ear function based on the difficulty (impedance) or ease (admittance) of sound flow through the middle ear. These include static impedance and dynamic impedance (i.e., tympanometry and impedance tests in conjunction with intra-aural muscle reflex elicitation). This term is used also for various components of impedance and admittance (e.g., compliance, conductance, reactance, resistance, susceptance).
Hearing loss due to exposure to explosive loud noise or chronic exposure to sound level greater than 85 dB. The hearing loss is often in the frequency range 4000-6000 hertz.
A general term for the complete or partial loss of the ability to hear from one or both ears.
Part of an ear examination that measures the ability of sound to reach the brain.
Noise present in occupational, industrial, and factory situations.
The ability or act of sensing and transducing ACOUSTIC STIMULATION to the CENTRAL NERVOUS SYSTEM. It is also called audition.
A nonspecific symptom of hearing disorder characterized by the sensation of buzzing, ringing, clicking, pulsations, and other noises in the ear. Objective tinnitus refers to noises generated from within the ear or adjacent structures that can be heard by other individuals. The term subjective tinnitus is used when the sound is audible only to the affected individual. Tinnitus may occur as a manifestation of COCHLEAR DISEASES; VESTIBULOCOCHLEAR NERVE DISEASES; INTRACRANIAL HYPERTENSION; CRANIOCEREBRAL TRAUMA; and other conditions.
Use of sound to elicit a response in the nervous system.
Self-generated faint acoustic signals from the inner ear (COCHLEA) without external stimulation. These faint signals can be recorded in the EAR CANAL and are indications of active OUTER AUDITORY HAIR CELLS. Spontaneous otoacoustic emissions are found in all classes of land vertebrates.
Hearing loss resulting from damage to the COCHLEA and the sensorineural elements which lie internally beyond the oval and round windows. These elements include the AUDITORY NERVE and its connections in the BRAINSTEM.
Personal devices for protection of the ears from loud or high intensity noise, water, or cold. These include earmuffs and earplugs.
Electrical waves in the CEREBRAL CORTEX generated by BRAIN STEM structures in response to auditory click stimuli. These are found to be abnormal in many patients with CEREBELLOPONTINE ANGLE lesions, MULTIPLE SCLEROSIS, or other DEMYELINATING DISEASES.
Loss of sensitivity to sounds as a result of auditory stimulation, manifesting as a temporary shift in auditory threshold. The temporary threshold shift, TTS, is expressed in decibels.
The ability to differentiate tones.
Hearing loss due to interference with the mechanical reception or amplification of sound to the COCHLEA. The interference is in the outer or middle ear involving the EAR CANAL; TYMPANIC MEMBRANE; or EAR OSSICLES.
Measurement of the ability to hear speech under various conditions of intensity and noise interference using sound-field as well as earphones and bone oscillators.
Any sound which is unwanted or interferes with HEARING other sounds.
A dimension of auditory sensation varying with cycles per second of the sound stimulus.
Transmission of sound waves through vibration of bones in the SKULL to the inner ear (COCHLEA). By using bone conduction stimulation and by bypassing any OUTER EAR or MIDDLE EAR abnormalities, hearing thresholds of the cochlea can be determined. Bone conduction hearing differs from normal hearing which is based on air conduction stimulation via the EAR CANAL and the TYMPANIC MEMBRANE.
The electric response evoked in the CEREBRAL CORTEX by ACOUSTIC STIMULATION or stimulation of the AUDITORY PATHWAYS.
The process whereby auditory stimuli are selected, organized, and interpreted by the organism.
The region of the cerebral cortex that receives the auditory radiation from the MEDIAL GENICULATE BODY.
The science pertaining to the interrelationship of psychologic phenomena and the individual's response to the physical properties of sound.
Examination of the EAR CANAL and eardrum with an OTOSCOPE.
Disorders of hearing or auditory perception due to pathological processes of the AUDITORY PATHWAYS in the CENTRAL NERVOUS SYSTEM. These include CENTRAL HEARING LOSS and AUDITORY PERCEPTUAL DISORDERS.
A type of non-ionizing radiation in which energy is transmitted through solid, liquid, or gas as compression waves. Sound (acoustic or sonic) radiation with frequencies above the audible range is classified as ultrasonic. Sound radiation below the audible range is classified as infrasonic.
Intra-aural contraction of tensor tympani and stapedius in response to sound.
Surgical reconstruction of the hearing mechanism of the middle ear, with restoration of the drum membrane to protect the round window from sound pressure, and establishment of ossicular continuity between the tympanic membrane and the oval window. (Dorland, 28th ed.)
NEURAL PATHWAYS and connections within the CENTRAL NERVOUS SYSTEM, beginning at the hair cells of the ORGAN OF CORTI, continuing along the eighth cranial nerve, and terminating at the AUDITORY CORTEX.
A term used in Eastern European research literature for the functional neural unit that provides the basis for differential sensitivity; the analyzer consists of receptor, afferent nerves, and their central connections. (From Campbell's Psychiatric Dictionary, 8th ed.)
Sound that expresses emotion through rhythm, melody, and harmony.
Wearable sound-amplifying devices that are intended to compensate for impaired hearing. These generic devices include air-conduction hearing aids and bone-conduction hearing aids. (UMDNS, 1999)
Acquired or developmental cognitive disorders of AUDITORY PERCEPTION characterized by a reduced ability to perceive information contained in auditory stimuli despite intact auditory pathways. Affected individuals have difficulty with speech perception, sound localization, and comprehending the meaning of inflections of speech.
Pathological processes of the ear, the hearing, and the equilibrium system of the body.
Pathological processes of the VESTIBULAR LABYRINTH which contains part of the balancing apparatus. Patients with vestibular diseases show instability and are at risk of frequent falls.
An illusion of movement, either of the external world revolving around the individual or of the individual revolving in space. Vertigo may be associated with disorders of the inner ear (EAR, INNER); VESTIBULAR NERVE; BRAINSTEM; or CEREBRAL CORTEX. Lesions in the TEMPORAL LOBE and PARIETAL LOBE may be associated with FOCAL SEIZURES that may feature vertigo as an ictal manifestation. (From Adams et al., Principles of Neurology, 6th ed, pp300-1)
Formation of spongy bone in the labyrinth capsule which can progress toward the STAPES (stapedial fixation) or anteriorly toward the COCHLEA leading to conductive, sensorineural, or mixed HEARING LOSS. Several genes are associated with familial otosclerosis with varied clinical signs.
The cochlear part of the 8th cranial nerve (VESTIBULOCOCHLEAR NERVE). The cochlear nerve fibers originate from neurons of the SPIRAL GANGLION and project peripherally to cochlear hair cells and centrally to the cochlear nuclei (COCHLEAR NUCLEUS) of the BRAIN STEM. They mediate the sense of hearing.
Surgery performed in which part of the STAPES, a bone in the middle ear, is removed and a prosthesis is placed to help transmit sound between the middle ear and inner ear.
The perceived attribute of a sound which corresponds to the physical attribute of intensity.
Hearing loss without a physical basis. Often observed in patients with psychological or behavioral disorders.
The process whereby an utterance is decoded into a representation in terms of linguistic units (sequences of phonetic segments which combine to form lexical and grammatical morphemes).
Partial hearing loss in both ears.
A number of tests used to determine if the brain or balance portion of the inner ear are causing dizziness.
The graphic registration of the frequency and intensity of sounds, such as speech, infant crying, and animal vocalizations.
The state of activity or tension of a muscle beyond that related to its physical properties, that is, its active resistance to stretch. In skeletal muscle, tonus is dependent upon efferent innervation. (Stedman, 25th ed)
The dorsal portion or roof of the midbrain which is composed of two pairs of bumps, the INFERIOR COLLICULI and the SUPERIOR COLLICULI. These four colliculi are also called the quadrigeminal bodies (TECTUM MESENCEPHALI). They are centers for visual sensorimotor integration.
The part of the inner ear (LABYRINTH) that is concerned with hearing. It forms the anterior part of the labyrinth, as a snail-like structure that is situated almost horizontally anterior to the VESTIBULAR LABYRINTH.
Recording of nystagmus based on changes in the electrical field surrounding the eye produced by the difference in potential between the cornea and the retina.
The space and structures directly internal to the TYMPANIC MEMBRANE and external to the inner ear (LABYRINTH). Its major components include the AUDITORY OSSICLES and the EUSTACHIAN TUBE that connects the cavity of middle ear (tympanic cavity) to the upper part of the throat.
The sounds produced by humans by the passage of air through the LARYNX and over the VOCAL CORDS, and then modified by the resonance organs, the NASOPHARYNX, and the MOUTH.
A part of the MEDULLA OBLONGATA situated in the olivary body. It is involved with motor control and is a major source of sensory input to the CEREBELLUM.
The hearing and equilibrium system of the body. It consists of three parts: the EXTERNAL EAR, the MIDDLE EAR, and the INNER EAR. Sound waves are transmitted through this organ where vibration is transduced to nerve signals that pass through the ACOUSTIC NERVE to the CENTRAL NERVOUS SYSTEM. The inner ear also contains the vestibular organ that maintains equilibrium by transducing signals to the VESTIBULAR NERVE.
The aggregate business enterprise of manufacturing textiles. (From Random House Unabridged Dictionary, 2d ed)
The posterior pair of the quadrigeminal bodies which contain centers for auditory function.
The interference of one perceptual stimulus with another causing a decrease or lessening in perceptual effectiveness.
A basement membrane in the cochlea that supports the hair cells of the ORGAN OF CORTI, consisting keratin-like fibrils. It stretches from the SPIRAL LAMINA to the basilar crest. The movement of fluid in the cochlea, induced by sound, causes displacement of the basilar membrane and subsequent stimulation of the attached hair cells which transform the mechanical signal into neural activity.
An auditory orientation mechanism involving the emission of high frequency sounds which are reflected back to the emitter (animal).
Order of mammals whose members are adapted for flight. It includes bats, flying foxes, and fruit bats.
Three long canals (anterior, posterior, and lateral) of the bony labyrinth. They are set at right angles to each other and are situated posterosuperior to the vestibule of the bony labyrinth (VESTIBULAR LABYRINTH). The semicircular canals have five openings into the vestibule with one shared by the anterior and the posterior canals. Within the canals are the SEMICIRCULAR DUCTS.
A benign SCHWANNOMA of the eighth cranial nerve (VESTIBULOCOCHLEAR NERVE), mostly arising from the vestibular branch (VESTIBULAR NERVE) during the fifth or sixth decade of life. Clinical manifestations include HEARING LOSS; HEADACHE; VERTIGO; TINNITUS; and FACIAL PAIN. Bilateral acoustic neuromas are associated with NEUROFIBROMATOSIS 2. (From Adams et al., Principles of Neurology, 6th ed, p673)
Psychophysical technique that permits the estimation of the bias of the observer as well as detectability of the signal (i.e., stimulus) in any sensory modality. (From APA, Thesaurus of Psychological Index Terms, 8th ed.)
Pathological processes of the VESTIBULOCOCHLEAR NERVE, including the branches of COCHLEAR NERVE and VESTIBULAR NERVE. Common examples are VESTIBULAR NEURITIS, cochlear neuritis, and ACOUSTIC NEUROMA. Clinical signs are varying degree of HEARING LOSS; VERTIGO; and TINNITUS.
Ability to determine the specific location of a sound source.
The time from the onset of a stimulus until a response is observed.
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
The measurement of magnetic fields over the head generated by electric currents in the brain. As in any electrical conductor, electric fields in the brain are accompanied by orthogonal magnetic fields. The measurement of these fields provides information about the localization of brain activity which is complementary to that provided by ELECTROENCEPHALOGRAPHY. Magnetoencephalography may be used alone or together with electroencephalography, for measurement of spontaneous or evoked activity, and for research or clinical purposes.
Gradual bilateral hearing loss associated with aging that is due to progressive degeneration of cochlear structures and central auditory pathways. Hearing loss usually begins with the high frequencies then progresses to sounds of middle and low frequencies.
Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time.
Diseases caused by factors involved in one's employment.
The brain stem nucleus that receives the central input from the cochlear nerve. The cochlear nucleus is located lateral and dorsolateral to the inferior cerebellar peduncles and is functionally divided into dorsal and ventral parts. It is tonotopically organized, performs the first stage of central auditory processing, and projects (directly or indirectly) to higher auditory areas including the superior olivary nuclei, the medial geniculi, the inferior colliculi, and the auditory cortex.
Elements of limited time intervals, contributing to particular results or situations.
Electronic hearing devices typically used for patients with normal outer and middle ear function, but defective inner ear function. In the COCHLEA, the hair cells (HAIR CELLS, VESTIBULAR) may be absent or damaged but there are residual nerve fibers. The device electrically stimulates the COCHLEAR NERVE to create sound sensation.
Sounds used in animal communication.
The ability to estimate periods of time lapsed or duration of time.
Sensorineural hearing loss which develops suddenly over a period of hours or a few days. It varies in severity from mild to total deafness. Sudden deafness can be due to head trauma, vascular diseases, infections, or can appear without obvious cause or warning.
Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
An oval semitransparent membrane separating the external EAR CANAL from the tympanic cavity (EAR, MIDDLE). It contains three layers: the skin of the external ear canal; the core of radially and circularly arranged collagen fibers; and the MUCOSA of the middle ear.
A subfamily of the Muridae consisting of several genera including Gerbillus, Rhombomys, Tatera, Meriones, and Psammomys.
Surgically placed electric conductors through which ELECTRIC STIMULATION is delivered to or electrical activity is recorded from a specific point inside the body.
Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot.
Differential response to different stimuli.
The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.
A common name used for the genus Cavia. The most common species is Cavia porcellus which is the domesticated guinea pig used for pets and biomedical research.
Surgical insertion of an electronic hearing device (COCHLEAR IMPLANTS) with electrodes to the COCHLEAR NERVE in the inner ear to create sound sensation in patients with residual nerve fibers.
A continuing periodic change in displacement with respect to a fixed reference. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A genus of the subfamily CALLITRICHINAE occurring in forests of Brazil and Bolivia and containing seventeen species.
A general term for the complete loss of the ability to hear from both ears.
Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.
A type of MAGNETIC RESONANCE IMAGING that uses only one nuclear spin excitation per image and therefore can obtain images in a fraction of a second rather than the minutes required in traditional MRI techniques. It is used in a variety of medical and scientific applications.
Sensory cells in the organ of Corti, characterized by their apical stereocilia (hair-like projections). The inner and outer hair cells, as defined by their proximity to the core of spongy bone (the modiolus), change morphologically along the COCHLEA. Towards the cochlear apex, the length of hair cell bodies and their apical STEREOCILIA increase, allowing differential responses to various frequencies of sound.
The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)
Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.

Age-related hearing loss, vitamin B-12, and folate in elderly women. (1/570)

BACKGROUND: Hearing impairment is 1 of the 4 most prevalent chronic conditions in the elderly. However, the biological basis of age-related hearing loss is unknown. OBJECTIVE: The objective was to test the hypothesis that age-related hearing loss may be associated with poor vitamin B-12 and folate status. DESIGN: A thorough audiometric assessment was conducted in 55 healthy women aged 60-71 y. Hearing function was determined by the average of pure-tone air conduction thresholds at 0.5, 1, 2, and 4 kHz and was categorized into 2 groups for logistic regression analyses: normal hearing (<20 dB hearing level; n = 44) and impaired hearing (> or = 20 dB hearing level; n = 11). RESULTS: Mean age was the same (65 y) for the normal hearing and impaired hearing groups. Pure-tone averages were inversely correlated with serum vitamin B-12 (r = -0.58, P = 0.0001) and red cell folate (r = -0.37, P = 0.01). Women with impaired hearing had 38% lower serum vitamin B-12 (236 compared with 380 pmol/L, respectively, P = 0.008) and 31% lower red cell folate (425 compared with 619 nmol/L, respectively, P = 0.02) than women with normal hearing. Among participants who did not take supplements containing vitamin B-12 or folate, women with impaired hearing had 48% lower serum vitamin B-12 (156 compared with 302 pmol/L, respectively, P = 0.0007) and 43% lower red cell folate (288 compared with 502 nmol/L, respectively, P = 0.001) than women with normal hearing. CONCLUSION: Poor vitamin B-12 and folate status may be associated with age-related auditory dysfunction.  (+info)

A possible neurophysiological basis of the octave enlargement effect. (2/570)

Although the physical octave is defined as a simple ratio of 2:1, listeners prefer slightly greater octave ratios. Ohgushi [J. Acoust. Soc. Am. 73, 1694-1700 (1983)] suggested that a temporal model for octave matching would predict this octave enlargement effect because, in response to pure tones, auditory-nerve interspike intervals are slightly larger than the stimulus period. In an effort to test Ohgushi's hypothesis, auditory-nerve single-unit responses to pure-tone stimuli were collected from Dial-anesthetized cats. It was found that although interspike interval distributions show clear phase-locking to the stimulus, intervals systematically deviate from integer multiples of the stimulus period. Due to refractory effects, intervals smaller than 5 msec are slightly larger than the stimulus period and deviate most for small intervals. On the other hand, first-order intervals are smaller than the stimulus period for stimulus frequencies less than 500 Hz. It is shown that this deviation is the combined effect of phase-locking and multiple spikes within one stimulus period. A model for octave matching was implemented which compares frequency estimates of two tones based on their interspike interval distributions. The model quantitatively predicts the octave enlargement effect. These results are consistent with the idea that musical pitch is derived from auditory-nerve interspike interval distributions.  (+info)

Auditory and electroencephalographic effects of midazolam and alpha-hydroxy-midazolam in healthy subjects. (3/570)

AIMS: Whereas cortical EEG effects of benzodiazepines are well characterized, information about benzodiazepine effects in other areas of the central nervous system is sparse. This study investigated the action of midazolam and its active metabolite alpha-hydroxy-midazolam on different parts of the auditory pathway in six healthy volunteers in a randomized, double-blind, three-way cross-over study. METHODS: Acoustically evoked short (SLP) and middle (MLP) latency potentials, transitory evoked otoacoustic emissions (TEOAE), and EEG power spectra were analysed after short i. v. injections of placebo, or 0.15 mg kg-1 midazolam, or alpha-hydroxy-midazolam, respectively. RESULTS: All subjects fell asleep during the 4 min infusion of active drug. SLP showed a significant transient increase of Jewett wave V 10 min after injection for midazolam and alpha-hydroxy-midazolam while the latency of wave I was unchanged. Both benzodiazepines induced a marked and long-lasting MLP amplitude decrease for 240 min with slow recovery over the following 360 min. No changes of TEOAE were observed. In agreement with earlier reports, increases in EEG beta activity and decreases in alpha activity were observed after administration of either drug. CONCLUSIONS: Systemically administered benzodiazepines modulate the auditory pathway above the level of the cochlea. While SLP changes were closely associated with sedation and high plasma benzodiazepine concentrations, MLP effects persisted for hours after sedation even at low benzodiazepine plasma levels. Evoked potentials may therefore be more sensitive than EEG as a tool to monitor benzodiazepine effects.  (+info)

Functional specificity in the right human auditory cortex for perceiving pitch direction. (4/570)

Previous lesion and functional imaging studies in humans suggest a greater involvement of right rather than left auditory cortical areas in certain aspects of pitch processing. In the present study, adaptive psychophysical procedures were used to determine auditory perceptual thresholds in 14 neurologically normal subjects, and in 31 patients who had undergone surgical resection from either the right or left temporal lobe for the relief of intractable epilepsy. In a subset of the patients, the lesion encroached significantly upon the gyrus of Heschl or its underlying white matter as determined from MRI analysis. Subjects were asked to perform two different perceptual tasks on the same set of stimuli. In a pitch discrimination task, the subject had to decide whether two elements of a pure tone pair were the same or different. In a task requiring the judgement of direction of pitch change, subjects decided whether pitch rose or fell from the first tone to the second. Thresholds were determined by measuring the minimum pitch difference required for correct task performance. Mean thresholds in the pitch discrimination task did not differ between patient groups and control subjects. In contrast, patients with temporal lobe excisions that encroached upon the gyrus of Heschl in the right hemisphere (but not in the left) showed significantly elevated thresholds when judging the direction of pitch change. These findings support a specialization of function linked to right auditory cortical areas for the processing of pitch direction, and specifically suggest a dissociation between simple sensory discrimination and higher order perception.  (+info)

Incidence of presbycusis of Korean populations in Seoul, Kyunggi and Kangwon provinces. (5/570)

Presbycusis, a bilateral sensorineural hearing loss caused by changes in the inner ear, is related to multiple factors such as noise exposure and otologic disease. In institute-based studies, we tried to determine the incidence of presbycusis in Korean populations living in Seoul, Kyunggi and Kangwon provinces by gender and age groups. The subjects were people who had visited health promotion centers. Pure tone audiometry was done over 20 years on 6,028 subjects. In a community-based study, the subjects were elderly residents of Kanghwa-do area. There were no obvious factors that could cause hearing impairment in the subjects. For the pure tone audiometry, hearing threshold was obtained by using the six-dimension method. The incidence of presbycusis for subjects aged 65 years and older was 37.8% and 8.3% for > or = 27 dB HL criterion and > or = 41 dB HL criterion, respectively. The incidence increased with age. A statistically significant difference in the hearing threshold was found between men and women aged 65 years or older. No differences were found between the community-based study and the institute- based studies. There was a high incidence (about 40%) of presbycusis among Koreans aged 65 years or older (for > or = 27 dB HL criterion). With an aging population, we anticipate that this report could be used to provide a basic data for the study of presbycusis.  (+info)

Children's detection of pure-tone signals with random multitone maskers. (6/570)

Preschoolers and adults were asked to detect a 1000-Hz signal, which was masked by a multitone complex. The frequencies and amplitudes of the components in the complex varied randomly and independently on each presentation. A staircase, cued two-interval, forced-choice procedure disguised as a "listening game" was used to obtain signal thresholds in quiet and in the presence of the multitone maskers. The number of components in the masker was fixed within an experimental condition and varied from 2 to 906 across experimental conditions. Thresholds were also measured with a broadband noise masker. Eight preschool children and eight adults were tested. Although individual differences were large, among both adults and children, there was little difference between the groups in the mean amount of masking produced by the maskers with large numbers of components (400 and 906). There was also a small but significant difference between adults and children in the mean amount of masking produced by the broadband noise. The difference between the groups was much larger with smaller numbers of components. Data obtained from the adults were basically similar to that previously reported [cf. Neff and Green, Percept. Psychophys. 41, 409-415 (1987); Oh and Lutfi, J. Acoust. Soc. Am. 104, 3489-3499 (1998)]: maskers comprised of 10-40 components produced as much as 30 to 60 dB of masking in some, but not all listeners. Those same maskers produced larger amounts of masking (70-83 dB) in many of the preschool children, although, as in the adult group, individual differences were large. The component-relative-entropy (CoRE) model [Lutfi, J. Acoust. Soc. Am. 94, 748-758 (1993)] was used to describe the differences in performance between the children and adults. According to this model the average child appears to integrate information over a larger number of auditory filters than the average adult.  (+info)

Hearing restoration from deafness after resection of a large cerebellopontine angle meningioma--case report. (7/570)

A 61-year-old man presented with a large cerebellopontine angle meningioma manifesting as a 1-year history of deafness on the right side, in whom hearing was restored from the deaf state immediately after tumor resection. Neuroimaging demonstrated a large mass in the right cerebellopontine angle, originating at the region adjacent to the jugular foramen. Audiometry showed his hearing was off-scale (> 105 dB) on the right. The tumor was successfully removed through the retrosigmoid approach, and the integrity of the 7th and 8th cranial nerves was maintained. The patient regained hearing on the day after the operation, which continued to improve until near-normal. The 8th cranial nerve function may recover dramatically after removal of non-acoustic tumors, even if preoperative hearing loss is profound. To maximize the opportunity to regain hearing, approaches which devastate cochlear function should be avoided and more meticulous manipulation during tumor removal is needed.  (+info)

Occurrence and risk of cochleotoxicity in cystic fibrosis patients receiving repeated high-dose aminoglycoside therapy. (8/570)

Cystic fibrosis (CF) patients receive repeated courses of aminoglycoside therapy. These patients would consequently be expected to be more susceptible to cochleotoxicity, a recognized side effect with single courses of aminoglycoside therapy. The primary aim of this retrospective study was to establish the incidence and severity of auditory deficit in CF patients. Standard (0.25- to 8-kHz) and high-frequency (10- to 16-kHz) pure-tone audiometry was carried out in 70 CF patients, and the results were compared with the results from 91 control subjects. These subjects were further divided into pediatric and adult groups. Of 70 CF patients, 12 (1 pediatric) displayed hearing loss considered to be caused by repeated exposure to aminoglycosides. There was a nonlinear relationship between the courses of therapy received and the incidence of hearing loss. The severity of the loss did not appear to be related to the number of courses received. Assuming the risk of loss to be independent for each course, preliminary estimates of per course risk of hearing loss were less than 2%. Upon comparison with previous clinical studies and experimental work, these findings suggest that the incidence of cochleotoxicity in CF patients is considerably lower than would be expected, suggesting that the CF condition may confer protection against aminoglycoside cochleotoxicity.  (+info)

Audiometers are devices employed to evaluate the level of hearing and to quantify and diagnose the degree of hearing loss. Audiometers consist of embedded hardware and a test subject feedback button connected to a pair of headphones. This system is controlled by a standard PC. The method of testing the hearing capacity is known as audiometry. Types of audiometry procedures include pure tone audiometry, immittance audiometry, speech audiometry, and evoked response audiometry. Pure tone audiometry is a process in which a patient is made to hear pure tones such as high-pitched tones at frequent intervals to determine the level of hearing loss. Speech audiometry is similar to pure tone audiometry, in terms of process followed; however, pure tones are replaced by human speech to determine the extent and area of hearing loss. Immittance audiometry is a process in which resistance offered by the ear parts to incoming sound is measured.. The global audiometers market is projected to witness modest ...
Hearing loss treatments centers provide services including comprehensive audiological evaluations, acoustic immittance measures, auditory brainstem testing, hearing aid testing and more. See below for local businesses in Concord that give access to hearing protection dispensing, hearing enhancement, as well as advice and content on assistive listening devices.
Hearing loss treatments centers provide services including comprehensive audiological evaluations, acoustic immittance measures, auditory brainstem testing, hearing aid testing and more. See below for local businesses in Lansing that give access to hearing protection dispensing, hearing enhancement, as well as advice and content on assistive listening devices.
Audiologic Solutions provides complete hearing evaluations, custom ear plugs, tinnitus treatment, speech testing, and more for you to hear at your best.
Based on SENTI FLEX technology, all air and bone pure tone audiometry (incl. MAGIC), speech audiometry features (Freiburger and other universal speech tests) and auditory processing disorder tests (MAUS, BASD) are in this set. Live Speech and automated audiometry based on Hughson Westlake or Bekesy are in!. ...
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Looking for online definition of speech audiometry in the Medical Dictionary? speech audiometry explanation free. What is speech audiometry? Meaning of speech audiometry medical term. What does speech audiometry mean?
And Others………. The report provides a basic overview of the Diagnostic Audiometer industry including definitions, segmentation, applications, key vendors, market drivers and market challenges. The Diagnostic Audiometer Market analysis is provided for the international markets including development trends, competitive landscape analysis, and key regions development status. Through the statistical analysis, the report depicts the global Diagnostic Audiometer Industry including capacity, production, production value, cost/profit, supply/demand and import/export. The total market is further divided by company, by country, and by application/type for the competitive landscape analysis.. Table of Contents. Chapter One Diagnostic Audiometer Industry Overview. • Diagnostic Audiometer Definition (Product Picture and Specifications). • Diagnostic Audiometer Classification and Application. • Diagnostic Audiometer Industry Chain Structure. • Diagnostic Audiometer Industry Overview. • ...
Define audiometry. audiometry synonyms, audiometry pronunciation, audiometry translation, English dictionary definition of audiometry. n. An instrument for measuring hearing activity for pure tones of normally audible frequencies. Also called sonometer . au′di·o·met′ric adj. au′di·om′e·try...
BACKGROUND: Self-reported hearing measures are useful for surveying hearing loss in a population because they are short, and easy to administer by either questionnaire or telephone. This study aims to assess the performance of several self-reported hearing measures to identify hearing loss in a group of Iowa farmers. METHODS: The study subjects were 98 male farmers who participated in the Iowa Fa
We outline our routine approach to tinnitus patients, highlighting the different aspects of our examination: the clinical history, objective ear, nose.. describes an audiological evaluation, the environment and instruments used in non-medical terms. Questions that the doctor may ask are provided and a brief description of word recognition tests and acoustic immittance. discusses how hearing tests (audiometry) are performed, how to prepare for the test, why it is performed, and how it will feel. provides excerpts from a book entitled, When Your Child is Deaf. Information on age for initial testing, description of auditory brainstem response (ABR), visual response audiometry (VRA), behavioral observational audiometry (BOA), play audiometry, and pure tone tests are all quoted from the book. gives clear details on what information the audiologist will need on the first visit, what will happen during testing, and what services should be made ...
Pure-tone audiometry is a behavioral test used to measure hearing sensitivity. This measure involves the peripheral and central auditory systems.
Diagnostic audiometers for comprehensive testing. Pure tone, air, bone and speech audiometry. Desktop or portable audiometers. Narrowband masking.
Merz Medizintechnik GmbH develops and markets medical technology systems for ENT diagnostics in the fields of audiometry, tympanometry, OAE measurement systems, evoked reaction audiometry, neurootology/vestibularis diagnostics, rhinomanometry and spirometry.. Founded as Merz in 2006, we can look back on over 20 years of activities and experience in the field of ENT. We do not only sell diagnostics, but also offer personal care and support on site, via remote maintenance, by telephone and e-mail through our continuously trained staff.. You order consumables and spare parts comfortably here in our evidENT Shop.. Merz Medizintechnik GmbH - Your partner for ENT diagnostics in medical practice and hospital!. Merz Medizintechnik GmbH has been a certified medical device manufacturer with a quality management system according to DIN EN ISO 13485:2016 since 2010.. ...
We provide comprehensive audiological evaluations as well as diagnose and treat hearing issues. Schedule an appointment with our audiologist.
Hearing screening should be conducted in a clinical or natural environment that is conducive to obtaining reliable screening results and that is free from auditory and visual distractions and interruptions. In addition, the location should allow for privacy and confidentiality.. Perform daily listening checks to rule out defects in major pure-tone screening components. Ambient noise levels may exceed ANSI standards for pure-tone threshold testing in audiometric test rooms (ANSI, 2013) but must be sufficiently low to allow accurate screening. A sound level meter, if available, may be used to establish maximum permissible noise levels at 25 dB HL for the earphone to be used during screening (i.e., supra-aural or insert earphones). However, when a sound level meter is not available, a biologic check is suitable.. ...
I was wondering why I started hearing T in both of my ears when actually PTA (Pure Tone Audiometry) shows noise induced damage in my Right Ear only,...
Our specially trained clinical staff is proud of its results. Using state-of-the-art equipment and testing procedures specifically suited for a childs age and diagnosis, results are obtained with most children, particularly those who are difficult to test. Patient evaluation and audiology procedures include: Audiological evaluation An evaluation done on all ages using either
St. Lukas Group offers Audiometry procedures starting from Price on request and it is specialized in Ear, Nose and Throat (ENT) treatments.
Learn more about Audiometry at Sky Ridge Medical Center DefinitionReasons for TestPossible ComplicationsWhat to ExpectCall Your Doctorrevision ...
The MA 25 audiometer is lightweight and small - but offers a full range of testing opportunities. Ideal for basic screening with air conduction.
The industrys newest and only pure tone Audiometer with sequential screening. User friendly, ideally suited for all practices, tests hearing manually or automatic with hard copy
Presbycusis is a type of sensorineural or perceptive hearing loss that is brought on by degeneration of specialized receptor cells of the inner ear. Other relevant information for presbycusis including its symptoms, causes, diagnosis, prevention and remedies have been also included in this page.
Cases reported • Presbycusis. On-line free medical diagnosis assistant. Ranked list of possible diseases from either several symptoms or a full patient history. A similarity measure between symptoms and diseases is provided.
The Ambco Patch Cord (#AMPC-3 / Set of 3) is designed for use with Ambco audiometers, such as the 650A, 650AB, 1000+, and 2500. It includes a 90 day warranty.
Background: Sudden sensorineural hearing loss (SSNHL) is an otologic emergency that warrants urgent management. Pure-tone audiometry remains the gold standard for definitively diagnosing SSNHL. However, in clinical settings such as primary care practices and urgent care facilities, conventional pure-tone audiometry is often unavailable. Objective: This study aimed to determine the correlation between hearing outcomes measured by conventional pure-tone audiometry and those measured by the proposed smartphone-based Ear Scale app and determine the diagnostic validity of the hearing scale differences between the two ears as obtained by the Ear Scale app for SSNHL. Methods: This cross-sectional study included a cohort of 88 participants with possible SSNHL who were referred to an otolaryngology clinic or emergency department at a tertiary medical center in Taipei, Taiwan, between January 2018 and June 2019. All participants underwent hearing assessments with conventional pure-tone audiometry and the proposed
Description of disease Occupational hearing loss. Treatment Occupational hearing loss. Symptoms and causes Occupational hearing loss Prophylaxis Occupational hearing loss
Description of disease Occupational hearing loss. Treatment Occupational hearing loss. Symptoms and causes Occupational hearing loss Prophylaxis Occupational hearing loss
Objective. Deferoxamine therapy in lifelong transfusion-dependent anaemias, as beta-thalassemia major, is associated with an increased risk of ototoxic changes. With increasing survival rates, prevention and/or early detection of ototoxicity are important for providing management options. The predictive value of pure-tone audiometry in early detection of ototoxicity has been questioned, particularly in the higher frequencies. Otoacoustic emissions appear to be more sensitive to cochlear insult than the conventional pure-tone audiometry. The aim of our study was to compare the efficacy of otoacoustic emissions (distortion-product otoacoustic emissions) with that of pure-tone audiometry as method of audiological monitoring ...
Introduction: Hearing loss is fairly a common disorder which is usually treated with corticosteroids via systemic administration and/or intra-tympanic injection. This study aimed to compare the effectiveness of intra-tympanic injections of dexamethasone with its combination with hyaluronic acid in patients with sudden sensorineural hearing loss. Materials and Methods: In this clinical trial, 40 patients were randomly assigned to two groups; in the first group, 20 patients received 2.4 mg intra-tympanic dexamethasone, while in the second group patients received injections of 2.4 mg of dexamethasone plus 2 mg of hyaluronic acid in combination. Patients in both groups were injected every other day to a total of three injections. The hearing status of patients was evaluated by pure tone audiometry (bone conduction threshold) before and 2 weeks after the intervention. Results: Assessment of hearing threshold before and after treatment in the two groups showed a significant difference between hearing
GUIDA, Heraldo Lorena; SOUSA, Ariane Laís de and CARDOSO, Ana Cláudia Vieira. Relationship between the findings of pure-tone audiometry and otoacoustic emission tests on military police personnel. Arquivos Int. Otorrinolaringol. [online]. 2012, vol.16, n.1, pp.67-73. ISSN 1809-4856. INTRODUCTION: Otoacoustic emissions can be an alternative for cochlear evaluation in noise induced hearing loss (NIHL). OBJECTIVE: To investigate the correlation between the findings of audiometry results and distortion product otoacoustic emissions (DPOAE) in the military police. METHOD: from cross-sectional and retrospective study, 200 military police officers were submitted to audiological evaluation - pure tone audiometry and DPOAE. RESULTS: considering the provisions of Ordinance 19 of the Labour Department, the results were suggestive of induced hearing loss by high sound pressure levels in 58 individuals, distributed as follows: 28 (48.3%) bilateral cases ...
Audiologists regularly encounter the following scenario: A patient comes into the clinic with complaints of difficulty hearing speech in background noise. An adult patient is often accompanied by a family member, perhaps a spouse or an older child, who readily confirms his or her loved ones communication problems. Concerns about difficulties with speech perception in noise are often raised by parents of school-age children. The childs school teacher and maybe primary care physician share the concerns. Then, the patients pure tone audiometry reveals hearing thresholds within normal limits. Or, especially for the elderly, the audiogram documents a modest deficit in hearing thresholds that is not compatible with the patients complaints.. Based solely on the results of pure tone audiometry and probably a few simple speech recognition tests, the audiologist may confidently tell the patient and indicate in a formal report that our testing shows that you have normal hearing. However, in most ...
Last year, the National Institute for Occupational Safety and Health (NIOSH) published a new research about the prevalence of occupational hearing loss among the noise-exposed services industry for sector workers. This part of the economy, which happens to be the largest employment sector of the U.S. industry, was found to have an elevated risk of hearing loss., , , , NIOSH researchers examined audiograms for 1.9 million noise-exposed workers across all industries, including audiograms for 158...
According to The National Institute for Occupational Safety and Health (NIOSH), occupational hearing loss is one of the most common work-related illnesses in the United States. Approximately 22 million U.S. workers are exposed to hazardous noise levels at work, and an additional 9 million are exposed to chemicals that can damage hearing or balance functions of the ear. An estimated $242 million is spent annually in the U.S. on worker s compensation for hearing loss disability., , , , Occupati...
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ERA - Electrical Response Audiometry. Looking for abbreviations of ERA? It is Electrical Response Audiometry. Electrical Response Audiometry listed as ERA
Objective To study the clinical efficacy of screening for noise induced hearing loss(NHIL)with distortion product otoacoustic emission(DPQAE) .Methods To mensure the noisy level of nine food package machines with acoustic metrology and the hearing levels were inspected 43 workers with pure tone and acoustic immitance and DPOAE, in the same time examining the outer ears and investigating time of noise endured,Result The average noise level of nine machines was 93.7dB(A),exceeding national regulation.Forty-three workers were normal with acoustic immitance and twenty-three workers were abnormal in hearing,seven of them were early and middle stage of noise induced hearing loss. Sixteen workers were normal with pure tone audiometry but abnormal with DPOAE.Conclusion DPOAE is a valuable method to detecte people enduring noise and discover NHIL earlier.
A 35 year old man presents to the emergency department with an 18 hour history of a right sided sudden hearing loss. Examination does not reveal a cause. A diagnosis of idiopathic sensorineural deafness is made. Your consultant suggests that a course of prednisolone might be of benefit. You discuss this with the registrar in audiological medicine who does not support this approach. You wonder who is right ...
OBJECTIVE: There are only a few population-based epidemiological studies on audiogram configurations among adults. The aim of this study was to investigate the prevalence of different audiogram configurations among older adults. In addition, audiogram configurations among subjects reporting hearing problems were examined.. DESIGN: Cross-sectional, population-based, unscreened epidemiological study among older adults.. STUDY SAMPLE: The subjects (n = 850), aged 54-66 years, were randomly sampled from the population register. A questionnaire survey, an otological examination, and pure-tone audiometry were performed.. RESULTS: The most prevalent audiogram configuration among men was high-frequency steeply sloping (65.3% left ear, 51.2% right ear) and among women, high-frequency gently sloping (33.0% left ear, 31.5% right ear). There were significantly more flat configurations among women than among men. Unclassified audiograms were common especially among women (17.5%). Subjects reporting hearing ...
Pure-tone audiometry performed monthly on nine preschool cleft palate children showed the incidence of hearing loss ranging from 25 to 71 percent from month to month, with all children experiencing a significant hearing loss at some time. (Author/KW)
Audiometry or the hearing test helps to determine the ability of a person to hear various sounds and consequently identify the location of damage in a person with diminished hearing sensitivity.
These tests check how well your child can hear.. In pure tone audiometry, a machine called an audiometer plays a series of tones through headphones. The tones change in pitch and loudness. The person giving the test will reduce the loudness of a tone until your child can no longer hear it. Then the tone will get louder until your child can hear it again. If your child can hear the tone, he or she will signal by raising a hand or pressing a button. The headphones will then be removed. A special vibrating device will be placed on the bone behind your childs ear. Again, your child will signal each time he or she hears a tone.. In play audiometry, the child responds to the tone he or she hears by a play activity, such as dropping a block or putting a toy in a container. ...
The impacts of the Sask. Partys recent budgets are still hurting families throughout the province in many ways. For instance, many are now struggling with the consequences of the Sask. Party cut to the Hearing Aid Plan - a service that provided audiological evaluation, hearing aids and fittings, counselling and education.. After years of blowing through record revenues, the Sask. Party panicked when the money ran out and started cutting in areas that would hurt the most vulnerable, said NDP Health Critic Vicki Mowat. For over 40 years, this was a program that helped so many people and families throughout the province. It hasnt taken long to see the damage that cutting it has done.. Stephanie Schneck and her 9-year-old daughter Gracie are among the many who have borne the brunt of these Sask. Party cuts. Gracie needs $6,400 hearing aids, but her parents cant afford to pay for them and have been forced to hold fundraisers to provide her with the health services she needs. Stephanie is ...
Paediatric Audiometry It is often more difficult to obtain accurate hearing thresholds at all frequencies when testing children under four years of age. Tympanometry and otoacoustic emissions are often performed prior to any subjective form of testing. Then, depending on the developmental age of the child, either distraction testing, performance testing (visual re-inforced
The research found a prevalence of 13% hearing loss (mild to complete) among 1.4 million audiograms studied, confirming and quantifying the prevalence
Background. Irreversible bilateral sensorineural hearing loss is a common side effect of platinum compounds. Because of extended overall survival period of children, a prolonged hearing surveillance and management of hearing impairments are emerging c
Tinnitus belongs to the most important symptoms in neurootology besides of vertigo, nausea and hearing loss. In most of the cases still the origin of the tinnitus is not yet explainable. It is well known that tinnitus may arise in any part of the hearing pathways, i.e., the cochlea receptor as well the temporal lobe and projection.. Frequently tinnitus is combined with the above mentioned neurootological symptoms vertigo, nausea and hearing loss. Especially in patients growing over the age of 40, the sign of tinnitus is increasingly found. However, we have to discriminate between an endogenous and maskable tinnitus from and exogenous tinnitus, which is produced by distorted hearing pathway actions under the picture of the hypersensitive ear.. In the history already the patients suffering from exogenous tinnitus explain, that they must avoid external noise. Of course a thorough analysis of the hearing pathways is performed in the neurootological laboratory including speech audiometry, otoacoustic ...
An audiometry exam tests your ability to hear sounds. Sounds vary, based on their loudness (intensity) and the speed of sound wave vibrations (tone). Hearing occurs when sound waves stimulate the nerves of the inner ear. The sound then travels along nerve pathways to the brain. Sound waves can travel to the inner ear through the ear canal,...
This study is based on an analysis of 14 patients with VS treated with stereotactic radiosurgery or radiotherapy in a newly setup cancer center in 2014 using a LINAC-based radiotherapy machine. Patients selection was done by a team of clinical oncologists, neurosurgeons and radiologists during tumour board meetings. All patients underwent pure tone audiometry, MR imaging and CT simulation planning sessions where these images were fused and treatment planning were done. A customised immobilisation device was fabricated during the CT simulation planning session using a frameless stereotactic mask system. 57% (n = 8) had SRS (12 Gy in single fraction) and 43% had hypofractionated SRT (35Gy in 7 fractions) as primary treatment. During treatment verification, image guidance consisting of dual in-room kV x-ray, two infrared cameras and 6D robotic couch patients positioning were used. The patients were then seen in clinic at six weeks post treatment to assess early side effects following which 6 ...
We provide noise hazard health services, including audiometry and hearing tests to help manage noise risks in the workplace. Contact us today.
MidMeds offer a fantastic range of Audiometry equipment and devices. Whether its for diagnostic or screening use, youll find it within our comprehensive range.
Though marketed as being wireless, there are obviously cables that work with this new audiometer from Otovation of King of Prussia, PA. The convenience com
Health management and winning practice articles, value-based healthcare, healthcare events, company and product directory, I-I-I videos and I-I-I blog interviews.
Health management and winning practice articles, value-based healthcare, healthcare events, company and product directory, I-I-I videos and I-I-I blog interviews.
A total of 90 imaging studies were reviewed (ESD = 22; non-ESD = 30; control = 38). ESD and non-ESD groups had similar pure-tone averages (33.9 ± 20.6 versus 41.6 ± 22.6 dB HL; p = 0.21) and frequency of definite Menières disease (59.1% versus 53.3%; p = 0.68). There was no significant trend between groups for any measurement. One nonsignificant trend existed in mean vestibule length, increasing from the control (5.45 ± 0.54 mm), non-ESD (5.80 ± 0.97 mm), and ESD (5.94 ± 0.81 mm) group. In a combined Menières group, mean vestibule length was significantly greater than controls (5.86 ± 0.89 versus 5.45 ± 0.54 mm; p = 0.008) and mean vestibule width significantly less (2.99 ± 0.46 versus 3.19 ± 0.39 mm; p = 0.024 ...
Diagnosis is based on clinical evaluation and audiometry. There may be a role for additional studies, such as auditory brainstem responses, otoacoustic emissions, and neuroimaging.Treatment is challenging as tinnitus is a symptom, not a disease. Thus…. ...
★★★ Prevention Magazine Tinnitus Will Tinnitus Go Away After Antibiotics Hearing Tinnitus Abigenol Tinnitus Tinnitus Audiometry. How To Reduce Tinnitus Sound…
Ambco, Biological Test Simulator. OTO-CHEK can be used with any manual audiometer or automatics with normally open relay contacts. Meets OSHA and other requirements for Biological Audiometer Calibration Checks.. Test frequencies: full range 125 to 8K ...
Automatic analysis of the patients conscious responses to the emission of auditory stimuli during the performance of an audiometry ...
Shoebox Audiometry Increases Early Detection of Hearing-Related Conditions, Weider was Excited to Join Dr. Bromwich on his Medical Innovation
Interacoustics is the leading manufacturer of Audiometers, tympanometers, middle ear analyzers, ABR/ERA/OAE, balance investigation and hearing equipment
Interacoustics is the leading manufacturer of Audiometers, tympanometers, middle ear analyzers, ABR/ERA/OAE, balance investigation and hearing equipment
Website created by the Main Library of the Silesian University of Technology as part of the Innovative Economy Operational Program for 2011-2013, Measure 2.3. Investments related to the development of science IT infrastructure ...
Hi everyone Im George and have been a sufferer of Tinnitus and Hyperacusis. I refer to them as T and H. If you dont know what H is. That is a...
LX 800 · Automatic Clip Limiter. (Dostosowywanie się wzmocnienia stopnia końcowego do amplitudy sygnału wejściowego. Oznacza to wyeliminowanie szkodliwego nasycania się stopnia mocy.). · Crossover 75Hz - 1200Hz.. o niezależna dla każdego kanału, płynna regulacja podziału częstotliwości,. o prosta konfiguracja dzielonych systemów Bi-amp.. · Wielostopniowy system zabezpieczeń.. o dla temperatury powyżej 100 C i D.C. na wyjściu odłączenie obciążenia,. o pojawienie się RF na wyjściu - automatyczna redukcja wystąpienia przesterowania,. o odłączanie wyjść wzmacniacza przy zwarciu.. · System wymuszonego chłodzenia. (Siła ciągu wentylatorów ustalana jest w dwustopniowym zakresie, pierwsza prędkość w zakresie temperatur radiatora do 60 C, druga prędkość powyżej tej temperatury.). · Automatyka cichego dołączania i odłączania obciążenia. (W czasie włączania i wyłączania wzmacniacza nie następuje mocne uderzenie sygnału w głośnik. Układ włącza się ...
Instytut Biocybernetyki i Inżynierii Biomedycznej im. Macieja Nałęcza PAN istnieje od 1975 roku. Jest największym centrum inżynierii biomedycznej w Polsce.
Instytut Biocybernetyki i Inżynierii Biomedycznej im. Macieja Nałęcza PAN istnieje od 1975 roku. Jest największym centrum inżynierii biomedycznej w Polsce.
Instytut Biocybernetyki i Inżynierii Biomedycznej im. Macieja Nałęcza PAN istnieje od 1975 roku. Jest największym centrum inżynierii biomedycznej w Polsce.
... is described as the gold standard for assessment of a hearing loss but how accurate pure-tone audiometry ... published Guidelines for Manual Pure-Tone Threshold Audiometry in 2005. There are cases where conventional pure-tone audiometry ... Pure Tone Audiometry: What is Pure Tone Average (PTA) Test?. Audition Cochlea Promenade oreille ear organ ... Pure-tone audiometry provides ear specific thresholds, and uses frequency specific pure tones to give place specific responses ...
Pure Tone Audiometry , Silber Records (2003) Or you could just go through your whole life… , Darla Records (2002) Morning One ...
SSHL is diagnosed via pure tone audiometry. If the test shows a loss of at least 30 dB in three adjacent frequencies, the ... The most common type of hearing test is pure tone audiometry (PTA). It charts the thresholds of hearing sensitivity at a ... There is also high frequency pure tone audiometry which tests frequencies from 8000-20,000 Hz. PTA can be used to differentiate ... Identification of sensorineural hearing loss is usually made by performing a pure tone audiometry (an audiogram) in which bone ...
"A comparison of pure tone auditory thresholds in human infants and adults". Infant Behavior and Development. 6 (1): 3-17. doi: ... Visual reinforcement audiometry (VRA) is a key behavioural test for evaluating hearing in young children. First introduced by ... which is when audiologists introduce Conditioned Play Audiometry. Conditioned orientation reflex (COR) is a variant of VRA ...
In conjunction with pure-tone audiometry, it can aid in determining the degree and type of hearing loss. Speech audiometry also ... Immittance audiometry is superior to pure tone audiometry in detecting middle ear pathology. Tympanometry Acoustic reflex ... Audiometry of children Conditioned play audiometry Behavioral observation audiometry Visual reinforcement audiometry Objective ... A pure tone audiometry hearing test is the gold standard for evaluation of hearing loss or disability.[medical citation needed ...
Other tests would include pure-tone and speech audiometry. AN patients can have a range of hearing thresholds with difficulty ...
Online pure-tone threshold audiometry (or screening) tests, electrophysiological measures, for example distortion-product OAEs ... Cox, Marco; de Vries, Bert (2021). "Bayesian Pure-Tone Audiometry Through Active Learning Under Informed Priors". Frontiers in ... Machine learning has been applied to audiometry to create flexible, efficient estimation tools that do not require excessive ... "Online Machine Learning Audiometry". Ear & Hearing. 40 (4): 918-926. doi:10.1097/AUD.0000000000000669. ISSN 0196-0202. PMC ...
Pure-tone audiometry tests provide accurate descriptions of a person's hearing. Since hearing perception encompasses both ... A common type of subjective hearing test requires the user to push a button if they can hear a tone that is played at a ... The tones are created from signals produced either in the headphones themselves or via Bluetooth from the mobile device. ... The user responds on the mobile application interface if they perceive tones. The device must communicate with the mobile app ...
Audiology Audiogram Audiometry Hearing test Pure tone audiometry IEC 60645-1. (November 19, 2001) "Audiometers. Pure-tone ... Bekesy audiometry typically yields lower thresholds and standard deviations than pure tone audiometry. Audiometer requirements ... An audiometer typically transmits recorded sounds such as pure tones or speech to the headphones of the test subject at varying ... The most common type of audiometer generates pure tones, or transmits parts of speech. Another kind of audiometer is the Bekesy ...
... carefully analyzes pure tone audiometry results aiming to identify early changes, and finally; continuously improving their ...
In pure tone audiometry, an audiometer is used to play a series of tones using headphones. The participants listen to the tones ... Some hearing tests include the whispered speech test, pure tone audiometry, the tuning fork test, speech reception and word ... When two simple tones are put together they create a complex tone. The simple tones of an instrument are called harmonics or ... The test will play with the volume controls and the participant is asked to signal when he or she can no longer hear the tone ...
"Conventional" pure tone audiometry (testing frequencies up to 8 kHz) is the basic measure of hearing status. For research ... pure tone audiometry in Meniere's disease Archived 2008-12-08 at the Wayback Machine from General Practice Notebook. Retrieved ... pure tone audiometry in otosclerosis Archived 2008-12-08 at the Wayback Machine from General Practice Notebook. Retrieved 2012 ... Hearing range Equal-loudness contour Minimum audibility curve Articulation index Pure tone audiometry Hearing (sense) Audiology ...
It was found that OAEs were more sensitive to identifying noise-induced cochlear damage than pure tone audiometry. In ... a composer who used this phenomenon in her music Pure tone audiometry The Hum Kemp, D. T. (1 January 1978). "Stimulated ... Stimulus-frequency OAEs (SFOAEs) are measured during the application of a pure-tone stimulus and are detected by the vectorial ... brief duration pure tone) stimulus. The evoked response from a click covers the frequency range up to around 4 kHz, while a ...
In clinical audiology, pure tones are used for pure-tone audiometry to characterize hearing thresholds at different frequencies ... In this situation, the instantaneous phase of the pure tone varies linearly with time. If a pure tone gives rise to a constant ... Sound localization is often more difficult with pure tones than with other sounds. Pure tones have been used by 19th century ... musical tones are perceived as a set of pure tones. The percept of pitch depends on the frequency of the most prominent tone, ...
"The Relevance of the High Frequency Audiometry in Tinnitus Patients with Normal Hearing in Conventional Pure-Tone Audiometry". ... Since most persons with tinnitus also have hearing loss, a pure tone hearing test resulting in an audiogram may help diagnose a ... Spontaneous otoacoustic emissions (SOAEs), which are faint high-frequency tones that are produced in the inner ear and can be ... Henry, James A.; Meikle, Mary B. (May 1999). "Pulsed versus Continuous Tones for Evaluating the Loudness of Tinnitus". Journal ...
However, this type of hearing impairment is often undetectable by conventional pure tone audiometry, thus the name "hidden" ... The overall prevalence of hearing loss (defined as a puretone average threshold across frequencies 1000, 2000, 3000, and 4000 ... "Distributions of pure-tone hearing threshold levels among adolescents and adults in the United States by gender, ethnicity, and ... As race and ethnicity are some of the factors that can affect the expected distribution of pure-tone hearing thresholds several ...
Pure-tone audiometry screening, in which there is typically no attempt to find threshold, has been found to accurately assess ... pure-tone audiometry screening, and otoacoustic emissions (OAEs). Otoscopy is useful in the examination of the external ear, ... OAEs can be used in populations where responses to pure-tone audiometry are either unable to be obtained or results are ... ASHA) (1985). Guidelines for identification audiometry. ASHA, 27(5), 49-52. World Health Organization (WHO). (1997). Report of ...
... as measured with pure tone audiometry. Using this test, auditory agnosia patients were often reported capable of detecting pure ... The primary distinction between auditory agnosia and cerebral deafness is the ability to detect pure tones, ... Iizuka O, Suzuki K, Endo K, Fujii T, Mori E (April 2007). "Pure word deafness and pure anarthria in a patient with ... and confirmed intact pure tone perception. Similarly, Barrett's aphasic patient, who was incapable of comprehending speech, had ...
Tests of auditory system (hearing) function include pure tone audiometry, speech audiometry, acoustic reflex, ... which is pure vertical/torsional). Central pathology can cause disequilibrium, which is the sensation of being off balance. The ...
... assess the sensitivity of hearing and the results of this test should always be viewed in conjunction with pure tone audiometry ... The instrument changes the pressure in the ear, generates a pure tone, and measures the eardrum responses to the sound at ... A tone of 226 Hz is generated by a probe tip inserted into the external ear canal, where the sound strikes the tympanic ... While 226 Hz is the most common probe tone, others can be used. In infants under 4 months of age, research has shown a 1000 Hz ...
... is a health-care professional technician who has received special training in the use of Pure tone audiometry equipment. An ... "Audiometric Officer Course - Audiometry Courses, Occupational Audiometry, WorkCover Approved, The Hearing Company". www. ... Hearing Audiometry Audiometer Audiogram Audiologist Audiology Hearing test Hearing loss Occupational Health "What is an ... The word "Audiometrist" is derived from the word Audiometry, as distinct from Audiology. However, the title audiometrist is ...
Pure-tone audiometry for air conduction thresholds at 250, 500, 1000, 2000, 4000, 6000 and 8000 Hz is traditionally used to ... A hearing test administered by a medical doctor, otolaryngologist (ENT) or audiologist including pure tone audiometry and ... One early consequence is that even young adults may lose the ability to hear very high frequency tones above 15 or 16 kHz. ... Abilities of young people to hear high frequency tones inaudible to those over 25 or so has led to the development of ...
It is also used in various kinds of audiometry, including pure tone audiometry, and the standard hearing test to test each ear ... Combination tones can interact with primary tones resulting in secondary combination tones due to being like their original ... An example of this is 3F1 - 2F2 Secondary combination tones are again similar to the combination tones of the primary tone. Off ... For example, a powerful spike at 1 kHz will tend to mask out a lower-level tone at 1.1 kHz. Also, two sine tones at 440 and 450 ...
Pure tone audiometry, a standardized hearing test over a set of frequencies from 250 Hz to 8000 Hz, may be conducted by a ...
The standard and most common type of hearing test is pure tone audiometry, which measures the air and bone conduction ... Unlike a pure-tone audiogram, the WIN test may provide a more functional test of a person's hearing in a situation that is ... noise masking effect of tone signals Advantages of the audiometry conducted with a specialized application or hearing aid ... In this test a probe is placed in the ear and a loud tone, greater than 70 dBSPL, is produced. The test measures the reflexive ...
... as indexed through pure tone audiometry). These symptoms may lead to difficulty attending to auditory information causing many ...
In pure-tone audiometry, this manifests as air-bone gaps on the audiogram (i.e. a difference of more than 10 dB between the air ... On audiometry, the hearing loss is characteristically low-frequency, with higher frequencies being affected later. ... Carhart R (June 1950). "Clinical application of bone conduction audiometry". Archives of Otolaryngology. 51 (6): 798-808. doi: ...
... the same concept in vision Mel scale Pure tone audiometry Robinson-Dadson curves Sound level meter Weighting filter Suzuki, ... However, research in the 1960s demonstrated that determinations of equal-loudness made using pure tones are not directly ... Fletcher and Munson adjusted the reference tone until the listener perceived that it was the same loudness as the test tone. ... "A re-determination of the equal-loudness relations for pure tones", Br. J. Appl. Phys. 7 (1956), pp.166-181. Yôiti Suzuki, et ...
... technique to detect gravitational waves Pure tone audiometry, hearing test Purified terephthalic acid, organic compound used to ...
Psychoacoustics Pure tone audiometry Hearing Loss by Robert Thayer Sataloff (Pages using div col with small parameter, Otology ... Articulation index Audiogram Audiology Audiometry A-weighting Equal-loudness contour Hearing range Hearing (sense) ...
The absolute threshold of hearing (ATH) is the minimum sound level of a pure tone that an average human ear with normal hearing ... Manual of Practical Audiometry: Volume 2 (Practical Aspects of Audiology). Chichester: Whurr Publishers. Kidd G. 2002. ... one with a tone and one without a tone. Listener must decide which interval had the tone in it. The number of the intervals can ... Finally, since the tone is always present, "yes" is always the correct answer. Method of constant stimuli In the method of ...
Flamme GA, Deiters K, Needham T (March 2011). "Distributions of pure-tone hearing threshold levels among adolescents and adults ... In conjunction with speech audiometry, it may indicate central auditory processing disorder, or the presence of a schwannoma or ... an instrument used to measure hearing by producing pure tone sounds through a range of frequencies) may not be detected. In ... As race are some of the factors that can affect the expected distribution of pure-tone hearing thresholds several other ...
Yeowart, N. S.; M. J. Evans (1974). "Thresholds of audibility for very low-frequency pure tones". J. Acoust. Soc. Am. 55 (4): ... a review of audiometry and hypothesized structure-function relationships". Biological Reviews. 95 (4): 1036-1054. doi:10.1111/ ... Yeowart, NS; Evans, MJ (1974). "Thresholds of audibility for very low-frequency pure tones". J Acoust Soc Am. 55 (4): 814-818. ... Behavioral responses do not increase for pure tone stimuli that are similar to recorded infrasonic calls in frequency and ...
This was the first site in Great Britain to have a permanent Western Electric Audiometer that used pure-tone testing rather ... and her pioneering work shaping the discipline of audiometry. Phyllis Margaret Tookey was born in April 1901, the only daughter ...
Ashihara, Kaoru (2007-09-01). "Hearing thresholds for pure tones above 16kHz". The Journal of the Acoustical Society of America ... Audiology Audiometry The Mosquito Seismic communication Minimum audibility curve Musical acoustics 20 to 20,000 Hz corresponds ... The present results show that some humans can perceive tones up to at least 28 kHz when their level exceeds about 100 dB SPL. ... Sounds that seem loud to humans often emit high-frequency tones that can scare away dogs. Whistles which emit ultrasonic sound ...
... audiometry MeSH E01.370.382.375.060.050 - audiometry, evoked response MeSH E01.370.382.375.060.055 - audiometry, pure-tone MeSH ... E01.370.382.375.060.060 - audiometry, speech MeSH E01.370.382.375.060.060.750 - speech discrimination tests MeSH E01.370. ...
Smartphone self-test audiometry can provide accurate and reliable air conduction hearing thresholds for adults in community ... Audiometry / methods* * Audiometry, Pure-Tone * Diagnostic Self Evaluation * Female * Hearing Loss / diagnosis* ... Accuracy and Reliability of Smartphone Self-Test Audiometry in Community Clinics in Low Income Settings: A Comparative Study ... Objectives: To investigate the accuracy and reliability of smartphone self-test audiometry in adults, in community clinics in ...
120 hours revision of 500 Video Lectures Crash Course on Ophthalmology,ENT,Preventive and Social Medicine based on University Previous Exam Question Papers.
Pure-tone test, also known as audiometry. During this test:. *You will put on headphones. ... Pure-Tone Testing; [cited 2019 Mar 30]; [about 4 screens]. Available from: ... At some points, the tones may be barely audible.. *The provider will ask you to respond whenever you hear the tones. Your ... A series of tones will be sent to your headphones.. *The audiologist or other provider will change the pitch and loudness of ...
Pure tone air conduction threshold audiometry for hearing conservation purposes ... be adversely affected by occupational noise exposure and presents techniques for automatic recording and manual audiometry. ...
Conditioned Play Audiometry. Older children are given a fun version of the pure tone audiometry test. Sounds of varying volume ... Pure Tone Audiometry. This test usually takes place in a soundproof booth. You will put on headphones that are connected to an ... Audiometry is a test that measures how well a person can hear. It is done by an audiologist. This is a person who is trained to ... Speech Audiometry. You will wear special headphones. You will hear simple, 2-syllable words. Words will be sent to one ear at a ...
Pure tone audiometry. Youll sit in a soundproof booth and wear headphones and a special headband. The audiologist will play ... Speech audiometry. Also in the booth with headphones, youll hear different words at different volumes and repeat them to the ... A machine measures their hearing nerves response to soft clicks or tones. ...
Aarktica - Pure Tone Audiometry $10.00 Notify me when this product is available:. ... "Autumnal" rides along on layers of lush & layered picked guitars, almost hymnal in tone, while "In Sea" simmers like an oceanic ...
ISO 8253-1:2010 specifies procedures and requirements for pure-tone air conduction and bone conduction threshold audiometry. ... Acoustics - Audiometric test methods - Part 1: Pure-tone air and bone conduction audiometry. ... For screening purposes, only pure-tone air conduction audiometric test methods are specified. It is possible that the ... Procedures and requirements for speech audiometry, electrophysiological audiometry, and where loudspeakers are used as a sound ...
Pure-tone audiometry and tympan.... Cite. Request full-text. Reduction of CRP after CPAP Treatment of OSA: A Systematic Review ...
i,Results,/i,. Pure tone audiometry results showed that the average hearing threshold of good ears and bad ears was ,span class ... The speech audiometry results showed that the disyllable word recognition score of the bad ears in quiet increased ... The measurements were evaluated before and after one month of wearing hearing aids using the pure tone audiometry threshold, ... Pure Tone Audiometry. The average hearing threshold of good and bad ears before wearing the hearing aids was HL and , ...
... tympanometry and pure tone audiometry [‎PTA]‎ were done. Ear disease was found in 27.5% of the ears examined. The commonest ...
... pure tone audiometry; SIN, speech-in-noise; SNHL, sensorineural hearing loss; SNR, signal-to-noise ratio; TFS, temporal fine ... and analyzed the FFR results together with their pure tone audiometry (PTA) thresholds and SIN performance. We hypothesized ... Buss, E., Hall, J. W., and Grose, J. H. (2004). Temporal fine-structure cues to speech and pure tone modulation in observers ... Independent sample t-tests were used to determine the differences in age, pure tone thresholds, SIN thresholds, S-R ...
Pure-tone audiometry was conducted in both ears at 500, 1000, 2000, 3000, 4000, 6000, and 8000 Hz. All noise exposures were ... pure-tone audiometry; referee; sports; temporary threshold shift; TTS ... The threshold shifts between the pre- and post-game audiometry were statistically significant in the left ear at 500 (p=.019), ... Noise induced hearing loss; Noise exposure; Hearing; Hearing loss; Hearing threshold; Exposure levels; Risk factors; Audiometry ...
Pure-tone audiometry was conducted in both ears at 500, 1000, 2000, 3000, 4000, 6000, and 8000 Hz. All noise exposures were ... pure-tone audiometry; referee; sports; temporary threshold shift; TTS ... Noise induced hearing loss; Noise exposure; Hearing; Hearing loss; Hearing threshold; Exposure levels; Risk factors; Audiometry ... The threshold shifts between the pre- and post-game audiometry were statistically significant in the left ear at 500 (p=.019), ...
Hearing threshold levels were determined by pure tone audiometry. Included in the testing were 500 Hz, 1,000 Hz, 2,000 Hz, and ... Pure-tone audiometric test data for 6,913 sample persons ages 25-74 years who received the detailed medical examination-3,854 ... 4)Puretone audiometry tests were carried out on examined persons between the ages of 4 and 19 years, permitting determination ... Puretone audiometry This test, conducted on examined persons between the ages of 6 and 74, permitted determination of threshold ...
Play Conditioning Audiometry.. *Pure-Tone Audiometry. *Real Ear Measurement.. *Tympanometry. *Visual Reinforcement Audiometry ( ...
Pure tone audiometry. *Auditory brainstem response audiometry. *Otoacoustic emission audiometry. Qualified professionals may ...
Extended High Frequency Pure Tone Audiometry [ Time Frame: 3 months ]. Pure tone audiometry will be measured to determine a ... Standard Pure Tone Audiometry [ Time Frame: 3 months ]. Standard pure tone audiometry will be measured to determine a subjects ... A pure tone average of 26-70 dB at 500Hz, 1000Hz, 2000Hz, and 4000Hz at Screening in the ear to be injected. ...
Guidelines for manual pure-tone audiometry. ASHA, 1978, 20:297-301.. *Hoffmann B, Robra BP, Swart E. Soziale Ungleichheit und ... and bone-conduction audiometry between 500 Hz and 8000 Hz. Hearing loss was defined as a pure-tone average hearing level in the ... Influence of hyperlipidemia and smoking on age-related changes in caloric response and pure-tone hearing. Acta otolaryngolica, ... screening pure-tone air-conduction (air conduction hearing threshold and speech reception threshold), ...
Hunter et al showed correlation between baseline pure-tone audiometry and speech discrimination scores and maintaining ... The rule suggests that individuals with a pure-tone average greater than 50 dB and speech discrimination less than 50% do not ... Other surgeons have stricter criteria and consider only individuals with better than a 30-dB pure-tone average and more than 70 ... their data predicted a two-fold likelihood of developing nonserviceable hearing for every 10 dB increase in pure-tone average ...
Audiometry, Pure-Tone. 3. 2015. 211. 0.200. Why? Family. 3. 2015. 3121. 0.190. Why? ...
The gold standard test is pure-tone audiometry. The test is simple and painless: you wear earphones and listen to pure tones at ... different pitches and volumes sent to one or both ears, letting the audiologist know when you can no longer hear the tone. ...
pure-tone audiometry. *tympanometry and stapedius reflex. *MRI (gadolinium-enhanced fine-cut of facial nerve course) ... Failure to demonstrate any return of hemi-facial tone or movement within 4 to 6 months suggests an alternative diagnosis. ... absence of any return of hemi-facial tone or movement by this time is highly suggestive of an alternative diagnosis.[1] ...
Hearing preservation will be measured postoperatively with pure tone audiometry. Secondary objectives are to compare the effect ... The acoustic pure tones stimuli will be delivered via an earphone (earplug) on the operated ear. This will be coupled to the ... In addition, the most recent pure tone thresholds (250 Hz, 500 Hz and 1, 2, 4, and 8 kHz) and speech reception thresholds (SRT ... The work-up includes a pure tone audiogram (PTA), a speech audiogram, a preoperative CT, and interviews with speech therapist, ...
Speech audiometry: These tests use spoken words and sentences rather than pure tones. Tests are designed to assess sensitivity ... Pure tone audiogram testing: This is a graphic plot of a patients thresholds of auditory sensitivity for pure tone (sine wave ... Pure tone thresholds are abnormal. The entire range of abnormalities, from near-normal to profound, may be seen. A more severe ... Poor speech discrimination scores are out of proportion with the level of loss suspected based on the pure tone average. ...
... pure tone audiometry, including air conduction testing and bone conduction testing; (ii) live voice or recorded voice speech ... audiometry to determine proper selection and fitting of a hearing instrument; (v) taking ear mold impressions; and (vi) using ... audiometry including speech recognition (discrimination) testing, most comfortable loudness level, and uncomfortable loudness ...
Baseline impairment of hearing by pure tone audiometry defined as patients with age-adjusted hearing thresholds ,95th ...
  • Otoscopic examination, tympanometry and pure tone audiometry [‎PTA]‎ were done. (
  • Study participants underwent tympanometry, pure tone and speech audiometry, transient evoked otoacoustic emissions, and brainstem auditory evoked potentials, with blood lead monitoring over a period of 35.5 months. (
  • When combined with audiometry, tympanometry can confirm a conductive hearing loss. (
  • The pattern of the acoustic reflex response-when combined with results from tympanometry, reflex decay, and audiometry-can assist in confirming the diagnosis of conductive hearing loss, sensorineural hearing loss, eighth nerve tumor, facial nerve disorder, or a lesion in the lower brainstem in the central portion of the reflex arc. (
  • Developmental age of 10 months - Visual Reinforcement Audiometry. (
  • Air conduction hearing thresholds for octave frequencies 0.5 to 8 kHz collected with the smartphone self-test in non-sound treated environments were compared to those obtained by reference audiometry. (
  • Smartphone self-test audiometry can provide accurate and reliable air conduction hearing thresholds for adults in community clinics in low-income settings. (
  • Pure tone audiogram testing: This is a graphic plot of a patient's thresholds of auditory sensitivity for pure tone (sine wave) stimuli. (
  • Pure tone thresholds are abnormal. (
  • Speech Threshold audiometry assesses the patient's ability to respond to speech at various intensities and confirms that the audiometric thresholds obtained are consistent with the speech thresholds. (
  • Differences between mean pure tone audiometry thresholds and hearing loss for numbers were calculated and statistically compared. (
  • King-Kopetzky syndrome (KKS) is the condition in which an individual complains of having difficulties understanding speech in background noise but has normal hearing thresholds on pure tone audiometry. (
  • ISO 8253-1:2010 specifies procedures and requirements for pure-tone air conduction and bone conduction threshold audiometry. (
  • The measurements were evaluated before and after one month of wearing hearing aids using the pure tone audiometry threshold, speech recognition in quiet and in noise, and the Glasgow Benefit Inventory (GBI) benefit scale score. (
  • The threshold shifts between the pre- and post-game audiometry were statistically significant in the left ear at 500 (p=.019), 2000 (p=.0009), 3000 (p (
  • Audiometry includes air and bone conduction testing, speech threshold, and word discrimination testing, as well as determination of UCLs and MCLs. (
  • Similarly, Word Discrimination audiometry assesses the patient's ability to hear and repeat words at a level above threshold. (
  • The literature describes different calculation variations for plausibility checking in expertise by comparison of mean hearing loss in pure tone threshold audiometry and hearing loss for numbers in speech audiometry. (
  • There are 2 types of Speech Audiometry: Speech Reception Threshold and Speech Discrimination. (
  • For screening purposes, only pure-tone air conduction audiometric test methods are specified. (
  • Air Conduction puretone audiometry assesses the patient's ability to respond to stimuli at various frequencies and intensities presented via headphones, insert earphones, or soundfield speakers. (
  • This measure determines the degree, type, and configuration of the hearing loss when cross checked with acoustic immittance, bone conduction audiometry, and otoacoustic emissions. (
  • Bone Conduction puretone audiometry assesses the patient's ability to respond to stimuli at various frequencies and intensities presented via a bone oscillator. (
  • In some types, you only lose the ability to hear high or low tones, or you lose only air or bone conduction. (
  • The subjects, all over age 70, had their hearing tested by air-conduction pure-tone audiometry, according to established NHANES protocols. (
  • MACSUG visually displays the process of manual pure-tone, air-conduction audiometric testing, when used in a. (
  • MACSUG visually displays the process of manual pure-tone, air-conduction audiometric testing, when used in a teaching environment where the user (individual or instructor with students) enters input that simulates the response of the patient. (
  • Sounds or tones that are presented to the ear (outer and middle ear) through an earphone are called an Air Conduction Test. (
  • Another type of Puretone Audiometry is a Bone Conduction Test wherein a small device or an oscillator is placed behind the patient's ear or the mastoid bone. (
  • Hearing evaluation was performed using pure-tone audiometry and middle ear pathology was evaluated by impedance audiometry. (
  • Specifies procedures and requirements without masking that are applicable to individuals whose hearing sensiticity might be adversely affected by occupational noise exposure and presents techniques for automatic recording and manual audiometry. (
  • MACSUG (Manual Audiometer Computer Simulator User Gizmo) is a simulated audiometer interface that provides hearing conservation and audiology educators with an educational resource for simulating and illustrating techniques and principles of manual audiometry and audiogram review. (
  • A computer using MACSUG (when used with a computer projector system or at least the computer's monitor) can display to large groups concepts that demonstrate basic manual audiometry techniques in a format consistent with microprocessor audiometers used in industrial hearing conservation. (
  • Pure tone testing (audiogram) -- For this test, you wear earphones attached to the audiometer. (
  • Immittance audiometry -- This test measures the function of the ear drum and the flow of sound through the middle ear. (
  • This test shows only the patient's ability to hear sounds or tones. (
  • Speech Audiometry is vital in the completion of a patient's evaluation as this helps the hearing health professional or audiologist determine a patient's hearing and comprehension capabilities. (
  • To investigate the accuracy and reliability of smartphone self-test audiometry in adults, in community clinics in low-income settings. (
  • Adults - Hearing assessment every 5 years using pure tone audiometry if possible, supported by a word test. (
  • Methods: We analyzed data from 3,698 U.S. adults 20-69 years of age who had been randomly assigned to the National Health and Nutrition Examination Survey (NHANES) 1999-2004 Audiometry Examination Component. (
  • Blood serum levels of the organochlorine insecticides HCB, p, p'-DDE (a breakdown product of DDT), trans-nonachlor and dieldrin were compared against audiometry examinations conducted on American adults aged 20-69. (
  • Measurement of hearing based on the use of pure tones of various frequencies and intensities as auditory stimuli. (
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  • Procedures and requirements for speech audiometry, electrophysiological audiometry, and where loudspeakers are used as a sound source are not specified. (
  • The patients under analysis underwent an otorhinolaryngological evaluation, pure tone audiometry, and acuphenometry. (
  • A total of 55 consecutive patients aged 13- to -85 year old who underwent hearing evaluation via pure tone audiometry were included in the study. (
  • Pre-operative and Post-operative audiometric evaluation were done using conventional pure tone audiometry with standard calibrations. (
  • Pure tone audiometry averages for each ear were interpreted and recorded based on the institution's reference, the World Health Organization Hearing Loss Classification as follows: normal (0-25dB), mild (26-40dB), moderate (41-60 dB), severe (61-80 dB), and profound (81dB and above). (
  • Most tests check for your response to tones or words delivered at different pitches, volumes, and/or noise environments. (
  • The test is simple and painless: you wear earphones and listen to pure tones at different pitches and volumes sent to one or both ears, letting the audiologist know when you can no longer hear the tone. (
  • Audiometry is a test that measures how well a person can hear. (
  • Older children are given a fun version of the pure tone audiometry test. (
  • Pure-tone test , also known as audiometry. (
  • The audiologist or other provider will change the pitch and loudness of the tones at different points during the test. (
  • The gold standard test is pure-tone audiometry. (
  • You'll most likely undergo a hearing test called pure tone audiometry, which can show the range of hearing that's been lost. (
  • Pure tone audiometry is a basic clinical test used to determine a person's hearing sensitivity at specific frequencies, i.e., the softest sound that can be perceived in a quiet environment. (
  • This study aims to determine the accuracy of the whispered voice test compared to standard pure tone audiometry in detecting hearing impairment in patients with subjective complaints of hearing loss and to determine the association of pure tone audiometry and whispered voice test results to the age of the subjects as well as to each other. (
  • Specificity, sensitivity, positive and negative predictive values, positive and negative likelihood ratios, and accuracy of the whispered voice test against standard pure tone audiometry were determined. (
  • The associations of the whispered voice test and pure tone audiometry to each other and to age were also established. (
  • To assess the prevalence of patients with hearing loss and the significant difference between the expected and observed result on demographic profile, the whispered voice test, and standard pure tone audiometry results, the researcher performed cross tabulation and Chi square test. (
  • A commonly used criterion to qualify for this diagnosis is a sensorineural hearing loss of greater than 30 dB over 3 contiguous pure-tone frequencies occurring within 3 days' period. (
  • The inability to hear pure tones below 25 dB indicates some hearing loss. (
  • The present study aims to investigate the association between childhood sensorineural hearing loss and mental health in adult men and women longitudinally in a large cohort with a matched control group, and hearing is measured by pure-tone audiometry. (
  • Risk was determined by analyzing the level of organochlorines in one's blood against the prevalence of hearing loss, indicated as pure-tone average greater than 20 decibels in one's better ear. (
  • Hunter et al showed correlation between baseline pure-tone audiometry and speech discrimination scores and maintaining serviceable hearing. (
  • Speech audiometry: These tests use spoken words and sentences rather than pure tones. (
  • Speech audiometry -- This tests your ability to detect and repeat spoken words at different volumes heard through a head set. (
  • Based on audiologic testing at the time of diagnosis, their data predicted a two-fold likelihood of developing nonserviceable hearing for every 10 dB increase in pure-tone average and a 1.5-fold likelihood of developing nonserviceable hearing for every 10% decline in speech discrimination score. (
  • Failure to demonstrate any return of hemi-facial tone or movement within 4 to 6 months suggests an alternative diagnosis. (
  • absence of any return of hemi-facial tone or movement by this time is highly suggestive of an alternative diagnosis. (
  • Data Collection Demographic data for the patients, results of their pure-tone audiometry, and their score on visual analog scale (VAS) of tinnitus loudness, annoyance, and effect on life were imported from their records held at the audiology department. (
  • An audiometry exam tests your ability to hear sounds. (
  • Two examiners performed pure tone audiometry and whispered voice tests independently and blindly. (
  • These may include completing a questionnaire and listening to whispered voices, tuning forks, or tones from an ear examination scope. (
  • Sounds vary, based on their loudness (intensity) and the speed of sound wave vibrations (tone). (
  • You'll be asked to tell the provider whenever you hear the tone at different volumes, or if you heard the sound in your left ear, right ear, or both equally. (
  • Symptoms of HL vary and may include tinnitus (ringing tone sensation) and muffled or distorted sounds [1]. (
  • This includes continuous noise from traffic, noises from the use of home appliances such as vacuum cleaners, blenders, personal sound systems, television, etc. when these sounds accumulate over years, it can lead to conditions that are related to pure presbycusis. (
  • In detailed audiometry, hearing is normal if you can hear tones from 250 to 8,000 Hz at 25 dB or lower. (
  • The provider will ask you to respond whenever you hear the tones. (
  • The minimum volume required to hear each tone is graphed. (
  • A tuning fork is a two-pronged metal device that makes a tone when it vibrates. (
  • The provider will hit the fork so that it makes a tone. (
  • Poor speech discrimination scores are out of proportion with the level of loss suspected based on the pure tone average. (
  • A machine measures their hearing nerve's response to soft clicks or tones. (
  • This includes pure-tone audiometry, speech testing and speech recognition testing. (

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