A surface acoustic wave element 11 having an inter digital electrode 12 formed on one surface of a piezo-electric substrate is arranged in a recess of a package 13 with the one surface being faced to a bottom surface of the recess of the package 13. An elastic conductive pad 35 having pads electrically connected to the electrode of the surface acoustic wave element 11 and electrodes of the package 13 is provided between the one surface of the surface acoustic wave element 11 and the package 13. The conductive pad 35 includes wiring means 35a, with which it is possible to connect the surface acoustic wave element 11 to the package 13 even when the position of the surface acoustic wave element in which the interdigital electrode is formed is deviated from the position of the electrodes of the package 13. The package 13 includes a cap 30 for pressing down the surface acoustic wave element 11. The surface acoustic wave element 11 is mounted on the conductive pad 35 in the package 13 with a surface of the
Molecular and Quantum Acoustics vol. 28 (2007) 65 THE INFLUENCE OF LOW FREQUENCY SOUND ON THE CHANGES OF EEG SIGNAL MORPHOLOGY Zbigniew DAMIJAN, Jerzy WICIAK University of Science and Technology - AGH,
TY - CHAP. T1 - Mechanical characterization of tissue mimicking phantoms by broadband surface acoustic waves. AU - Li,Sinan. AU - Qi,Yuns Heng. AU - Wei,Cheng. AU - Huang,Zhihong. AU - Li,Chunhui. AU - Wang,Ruikang PY - 2011. Y1 - 2011. N2 - Surface acoustic waves (SAWs) shows great potential in non-destructive mechanical characterization, it promises a non-invasive method of diagnosis of cirrhosis cutaneous and subcutaneous tissues. This paper explores a rapid way to evaluate the elastic property of soft tissue mimicking phantom by the analysis of SAWs phase velocity. An electromagnetic shaker with a line source was used to generate SAWs by square wave stimulus. A laser-vibrometer with displacement decoding mode was used to detect the SAWs. The phase velocities on agar phantoms were estimated. The result showed that the evaluation of SAWs phase velocity could be served as an accurate and rapid estimation of elasticity properties of soft materials.. AB - Surface acoustic waves (SAWs) shows great ...
Langasite surface acoustic wave devices can be used to implement harsh-environment wireless sensing of gas concentration and temperature. This paper reviews prior work on the development of langasite surface acoustic wave devices, followed by a report of recent progress toward the implementation of oxygen gas sensors. Resistive metal oxide films can be used as the oxygen sensing film, although development of an adherent barrier layer will be necessary with the sensing layers studied here to prevent interaction with the langasite substrate. Experimental results are presented for the performance of a langasite surface acoustic wave oxygen sensor with tin oxide sensing layer, and these experimental results are correlated with direct measurements of the sensing layer resistivity.
A surface acoustic wave device, including: a piezoelectric substrate; an interdigitated transducer electrode disposed on the substrate; an oxide film disposed on surface of the interdigitated transducer electrode; and a hydrophobic film disposed on a surface of the oxide film.
An acoustic wave sensor utilizes one or more acoustic waves trapped in an acoustic wave cavity to detect the presence of one or more substances on a surface of the acoustic wave cavity. To detect the presence of ice, a trapped torsional acoustic wave is used. To detect water, an acoustic wave with flexural or compressional components is used. The sensor includes a number of transducers adjacent the acoustic wave cavity where a controller drives different sets of the transducers to generate different acoustic waves.
Acoustic tweezers: manipulating particles, cells, and organisms using standing surface acoustic waves (SSAW) The ability to manipulate cells and microparticles in a biocompatible and dexterous manner is critical for numerous biological studies and applications such as cell-cell communication, biosensing, tissue engineering, and regenerative medicine. Here we summarize our recent progress on an "acoustic tweezers" technique that utilizes standing surface acoustic wave (SSAW) to manipulate particles, cells, and organisms. This technique is capable of manipulating cells and microparticles regardless of shape, size, charge or polarity. Its power intensity, approximately 107 times lower than that of optical tweezers, compares favorably with those of other active patterning methods. Cell viability, proliferation, and apoptosis studies have revealed the technique to be biocompatible. The aforementioned advantages, along with this techniques simple design and ability to be miniaturized, render the ...
Sensorineural hearing loss (sometimes called "nerve deafness") occurs when the cilia (hair cells) of the inner ear (the cochlea) do not function properly. In an undamaged ear, the pressure from sound waves goes into your pinna (the outer ear, the part you can see), makes the eardrum move back and forth, is passed along the small bones of the middle ear (the smallest bones in your body!), and then transfers to the middle ear, where those sound waves cause actual waves in the fluid-filled cochlea. The waves of fluid cause the hair cells to move. This sets off a beautiful chemical chain reaction, which ultimately causes stimulation of the auditory nerve (cranial nerve VIII), which sends the sensation of "sound" to the brain. The hair cells in the cochlea are tonotopically arranged, meaning that each region corresponds to different tones, going from high frequency sounds at the basal end to low frequency sounds at the apex of the cochlea, which looks like a snail shell. Think of a piano keyboard ...
The thesis that sounds are sound waves is also often motivated by the argument from vacuums. Surely, it is argued, sounds cannot exist in a vacuum. As Hylas says in Berkeleys Three Dialogues Between Hylas and Philonous, "a bell struck in the exhausted receiver of an air-pump, sends forth no sound. The air therefore must be thought the subject of sound" (1713: 171-2). But is the claim that there are no sounds in vacuums really obvious? On pain of question begging, it cannot be made to follow from any particular metaphysics of sounds. In order to assess it on its own merits, consider once more the analogy between, on the one hand, sounds and air, and, on the other hand, emission events at light sources and light. Air is the medium of auditory perception, and light is the medium of visual perception. The reasoning now is that just as things can sensibly be taken to have colors in the dark, they can sensibly be taken to produce sounds in a vacuum.. In the above arguments an important role is played ...
Nasal sounds By Yasmina El Bakouri & Araceli Gómez Lets practise! Frequent problems /m/ Bilabial /n/ alveolar velar Exercise D Exercise B Exercise C Exercise A /m/ (bilabial) (velar) /n/ (alveolar) Highlights of theory... This sound is made by closing your mouth. Now use your voice to make a sound. The sound is made by putting the tip of your tongue on the roof of your mouth, right behind your teeth. To make this sound, put your tongue up against the roof of the back of your mouth. Now, make a sound using your voice. Contrast between /m/ and /n/ at the end of a word Listen and match the words below with the correct sound Find words which show the contrast between two sounds Make sentences with contrast sound words It doesnt present major problems, except when the sound is in a final position. This sound its similar to the Catalan or Spanish /n/, thats why it doesnt cause too many problems to our students No problematic (middle sound) Why are they ...
Intensity - The amount of energy transported by a wave across a unit area per unit of time. The intensity of a sound wave determines the loudness of the sound. The unit of intensity is (W/m2) The lowest intensity the human ear can detect is 10-12 W/m2 The highest intensity the human ear can detect is 1 W/m2 Therefore, the sound range of intensity if 10-12 W/m2 to 1 W/m2 If you increase the intensity of a sound wave by about 10 times, the sound will sound about twice as loud as the original. Sound intensity levels are specified on a logarithmic scale. Unit = bel, named after Alexander Graham Bell. The unit decibel (dB) is more commonly used. (1 dB = 1/10 bel) The sound level is defined in terms of its intensity. Sound level = 10dB * log(I/Io) Io = Standard reference intensity, usually the minimum intesnity audible to a good human ear = 1.0 x 10-12 W/m2 ...
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. In dry air at 0 °C (32 °F), the speed of sound is 331.2 metres per second (1,087 ft/s; 1,192 km/h; 741 mph; 644 kn). At 20 °C (68 °F), the speed of sound is 343 metres per second (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or a kilometre in 2.91 s or a mile in 4.69 s. The speed of sound in an ideal gas depends only on its temperature and composition. The speed has a weak dependence on frequency and pressure in ordinary air, deviating slightly from ideal behavior. In common everyday speech, speed of sound refers to the speed of sound waves in air. However, the speed of sound varies from substance to substance: sound travels most slowly in gases; it travels faster in liquids; and faster still in solids. For example, (as noted above), sound travels at 343 m/s in air; it travels at 1,484 m/s in water (4.3 times as fast as in air); and at 5,120 m/s in iron (about 15 times as fast ...
The U.S. Department of Energys National Energy Technology Laboratory (NETL) has developed a method for achieving tunable gas sensitivity of surface acoustic wave (SAW) devices. The innovation implements a class of materials with tunable absolute film conductivities called conducting metal oxides (CMOs), which enables SAW devices to be calibrated for gas sensitivity in diverse harsh-environment conditions.
The ability of models developed for describing partitioning of organic vapors into polymeric materials in gas liquid chromatography (GLC) to model the responses of polymer coated surface acoustic wave (SAW) vapor sensors was evaluated. SAW vapor sensors operating at 158 megahertz were coated with OV-275, OV-25, poly(phenyl)ether, or poly(isobutylene) (PIB). Arrays of these sensors were exposed to
The technique of measuring surface acoustic wave (SAW) speed of a solid by an acoustic microscope has been known to the nondestructive evaluation (NDE) community for last twenty five years. A number...
Sound Blaster Ct4780 Driver Anywhere connects your smartphone to your Sound Blaster Ct4780 Driver at home, letting you enjoy your music and media collection no matter where you are. Simply take a few seconds to install the free Sound Blaster Ct4780 Driver light software included with purchase on your Windows Sound Blaster Ct4780 Driver. After establishing a connection, Sound Blaster Ct4780 Driver will display your computers entire Music collection on your smartphone - no matter how massive! You can Sound Blaster Ct4780 Driver download or playback all your media Sound Blaster Ct4780 Driver by streaming them on your smartphone. This allows you to transform your home Sound Blaster Ct4780 Driver into your personal media cloud. Access your media whenever you want, wherever you are! See for yourself today. Sound Blaster Ct4780 Driver for Windows will download, display and save images from the many thousands of webcams available on the internet Sound Blaster Ct4780 Driver monitors up to 1,000 ...
Dr. Parrack finds that rats and guinea pigs can be killed with high-frequency sound waves, but that man is safe against them because he has no fur. With the fur-bearing animals the sound energy is turned into heat. They die from high-frequency noise because they get so hot that the body proteins coagulate. When the hair is shaved off, there is no such coagulation effect. Man, with his much more efficient skin ventilating system, is safe at energy levels 120 times greater that rats are. ...
Acoustic tweezers work by setting up a standing surface acoustic wave. If two sound sources are placed opposite each other and each emits the same wavelength of sound, there will be a location where the opposing sounds cancel each other. This location can be considered a trough. Because sound waves have pressure, they can push very small objects, so a cell or nanoparticle will move with the sound wave until it reaches the trough where there is no longer movement. The particle or cell will stop and fall into the trough ...
Sound can be measured as a change in pressure when sound waves reach the ear or a measuring device. Sound exposure is usually measured in decibels of sound pressure level (dB SPL), which is a measure of the sound pressure level relative to the lowest hearing threshold of the young, healthy ear set as 0 dB. The scale is logarithmic and a ten-fold increase in the sound pressure level measured corresponds to an increase by 20 dB SPL.
Having been assessed as deaf enough for a cochlear implant, and passing the associated tests, I was wondering how much of an improvement in hearing the implant has given me. Lots of new high frequency sounds have been popping up whilst low frequency sounds have only just started coming back. It has been exactly two…
There are two Sound Level channels: A-weighted and C-weighted. The A‑weighted channel applies a filter to the sound level reading that mimics the human ears response to loudness and frequency. In most classroom situations, youll want to measure A-weighted sound levels. For more information on the difference between A- and C-weighted sound levels, see www.vernier.com/til/3500. The microphone is located inside the hole in the top of the case. Because the microphone is located inside the sensor, it is helpful to point the microphone hole toward the source of the sounds you are measuring.. When using the sensor, be mindful of the environment around it. Wind blowing across the opening or vibrations from the surface on which it is resting can cause the sensor to read much higher sound levels than it should. When collecting data, place the sensor on a soft surface or hold the sensor in your hand to separate the microphone from extraneous vibrations.. Example Sound Levels. ...
TY - JOUR. T1 - Preterm infants sympathetic arousal and associated behavioral responses to sound stimuli in the neonatal intensive care unit. AU - Salavitabar, Arash. AU - Doheny, Kim Kopenhaver. AU - Adkins, Cherie S.. AU - Susman, Elizabeth J.. AU - Palmer, Charles. AU - Storm, Hanne. PY - 2010/1/1. Y1 - 2010/1/1. N2 - PURPOSE: To evaluate the utility of skin conductance (SC) as a measure of autonomic arousal to sound stimuli in preterm infants. DESIGN: A pilot cross-sectional, correlations study. SUBJECTS: Eleven preterm infants with a mean gestational age of 31.6 weeks without anomalies or conditions associated with neurodevelopmental delay composed the sample. METHODS: On days 5-7 of life, the following infant responses were simultaneously recorded in response to naturally occurring sound stimuli in the NICU: real-time measurements of heart rate, respiratory rate, and oxygen saturations; sympathetic-mediated sweating via SC; and behavioral responses using the Newborn Individualized ...
The present invention relates to the communication or reproduction of sound, in particular audible sound. There is provided a method of communicating a sound, including the steps of: transmitting, onto an optical link, pairs of signal copies, the signal copies of a given pair having a time offset relative to one another; applying the audible sound to the optical link, such that the audible sound causes a phase modulation to the transmitted signal copies; receiving modulated signal copies previously transmitted onto the link; and, for received pairs of signal copies, causing one signal copy of a pair to mix with the other signal copy of that pair so as to produce a signal representative of the sound. The sound is an audible sound. It has been found that a delay of at least 75 micro seconds allows for a better reproduction of audio sounds, since these have a relatively low frequency content.
Certain aspects relate to providing an at least one audio source to at least one user. Certain aspects relate to selectively modifying an at least one first sound source to be provided to the at least one user, wherein the at least one first sound source is combined with an at least one second sound source, and wherein the selectively modifying is performed relative to the at least one audio source based at least in part on at least some specific information of the at least one first sound source. Other aspects relate to selectively modifying the at least one first sound source to be provided to the at least one user relative to the at least one second sound source based at least in part on at least some specific information of the at least one first sound source.
We provide evidence for pulse register phonation in the songbird syrinx, which can be generated by all possible interactions of the two sound sources, but typically involves the use of both sound generators and always gives rise to sounds with a rich harmonic structure. Since sounds were induced in deeply anaesthetized crows, the short labial opening events and the alternation of opening between the left and right sound generators must reflect passive mechanical dynamics of the vocal organ. The alternation pattern indicates coupling between the two sound sources, which might include mechanical coupling presumably via the semilunar membrane and/or direct acoustic coupling. Muscular control of the observed vibration pattern is highly unlikely. Even if the thoracic compression induces a reflex-like neural response, the syringeal muscles would not be fast enough to account for rapid opening events of 1.5 ms duration (Elemans et al. 2004; Rome 2006). We therefore conclude that the observed vibratory ...
Ultrasonic Cavitation is a no surgery and no anesthesia method of liposuction that destroys intractable fat cells by using low frequency sound waves. This type of sound waves can destroy the fat cells without causing damage to any other tissue or organs. Ultrasonic therapy forces a powerful sound wave to the fat cell membranes. The fat cell membranes succumbs to the pressure, is reduced to liquid and is expelled through the bodys normal metabolic method. Ultrasonic Cavitation destroys fat cells at such a rate and in such a quantity that fat storage is significantly reduced or eliminated. Clients sees the results and are pleased with the increase of their bodys fat cell metabolism.. Ultrasonic Cavitation therapy makes it possible to apply concentrated levels of ultrasonic energy to specific treatment areas. This type of therapy targets and destroys subcutaneous fat cell membranes through a series of microscopic implosions. Once the fat cell membrane is destroyed, the fat cell is discharged ...
Objective Sounds of chewing, breathing, keyboard typing are considered by most people as normal sounds and are ignored as background sounds in everyday listening. However, for a group of people these sounds are not only distracting but also evoke a strong feeling of anger accompanied by an urge to escape from the situation producing these sounds. This condition, marked by sensitivity to a selective group of sounds, was given the name "misophonia" (hatred of sounds) almost a decade ago. Since the sounds that act as "triggers" in this condition are quite common at home, work place and in social gatherings, misophonia has devastating effects on social, family and personal life of the sufferer. Presently misophonia is not featured in any official medical/psychiatric classifications. People with misophonia suffer in silence because they do not share their problem with others for the fear of being called "crazy". The objective of the current work was to check the consistency of profile of symptoms ...
Holophonics are binaural recording system created by Hugo Zuccarelli. Holophonics are based on the assumption that the auditory system acts as an interferometer, where electromagnetic waves are superimposed in order to extract information about the waves.. 3D holophonics relies on phase variance, just like stereophonic sound. Holophonics sounds are most clearly heard through headphones, though can be demonstrated to be effective with 2 channel stereo speakers, as long as they are phase coherent. In a 1983 article on the New Scientist, Hugo Zuccarelli stated that the human auditory system is a sound emitter, producing a reference sound that combines with incoming sound to form an interference pattern inside the ear. The nature of this pattern is sensitive to the direction of the incoming sound. According to the hypothesis, the cochlea detects and analyzes this pattern as if it were an acoustic hologram. The brain then interprets this data and infers the direction of the sound. Recordings released ...
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The sensors, which are based on SAW (surface acoustic wave) technology, are being used by the company as an aid to evaluating the performance of miniature electric motors.. To address motor-selection issues and, in particular, to assist in the development of a handheld sheep shear, Lister Shearing decided to set up a motor test rig that would allow the performance of motors from various suppliers to be compared quickly and easily.. A key requirement for this rig was that it should be able to accurately determine the torque produced by each motor and its speed under a range of operating conditions.. Torqsense sensors depend on surface acoustic wave transducers that comprise of two thin metal electrodes, in the form of interlocking fingers, on a piezoelectric substrate such as quartz.. When an RF signal of the correct frequency is applied to the transducer, surface acoustic waves are set up and the transducer behaves as a resonant circuit.. The essential feature, however, is that, if the substrate ...
Some conditions that affect your pet arent always evident during a clinic examination, which is why diagnostics such as X-rays, ultrasound and blood pressure monitors are used.. Here at Robin Lewis we use both X-ray and ultrasound technology to help get to the source of the problem quickly.. Both procedures are examples of medical imaging; both are painless and non-invasive.. Ultrasound uses high frequency sound waves and is a useful tool for imaging soft tissue such as the liver, bladder, heart and kidneys.. Our team will use an ultrasound probe, which sends out pulses of very high frequency sound, which penetrate the bodys tissues. Some of the sound waves are reflected when they meet an internal surface. The probe measures these reflected waves to create an image on screen.. X-rays on the other hand produce images of the inside of the body and are an effective way of looking at bones as well as some soft tissue. Animals must be anaethetised or sedated to prevent movement during the procedure ...
In addition to the place and manner of articulation, we can say that a consonant is voiced or voiceless. Put your fingers on your Adams apple for a moment and say something. Can you feel the vibrations? Thats because your vocal chords are being used. If a sound is voiced, it is because the vocal chords are used. But we dont always used our vocal chords to make consonant sounds - in fact, almost half of the consonant phonemes in English are voiceless, meaning that there is no movement made in our larynx. You may come across some classifications which refer to aspirated and unaspirated sounds rather than voiced and voiceless. This can be a little confusing, as generally voiced sounds are unaspitated and voiceless ones are aspirated. Aspiration refers to the airflow that is produced, and theres an easy test we can do to find out if a phoneme is aspirated or not. Put your hand, or even better, a sheet of paper, in front of your mouth. Now make the sound /b/. Does it move? Now make the sound /p/. ...
TY - JOUR. T1 - Perceiving and Reenacting Spatiotemporal Characteristics of Walking Sounds. AU - Young, William. AU - Rodger, Matthew. AU - Craig, Cathy M. PY - 2013/4/1. Y1 - 2013/4/1. N2 - Many studies have examined the processes involved in recognizing types of human action through sound, but little is known about whether the physical characteristics of an action (such as kinetic and kinematic parameters) can be perceived and imitated from sound. Twelve young healthy adults listened to recordings of footsteps on a gravel path taken from walks of different stride lengths (SL) and cadences. In 1 protocol, participants performed a real-time reenactment of the walking action depicted in a sound sample. Second, participants listened to 2 different sound samples and discriminated differences in SL. In a 2nd experiment, these procedures were repeated using synthesized sounds derived from the kinetic interactions between the foot and walking surface. A 3rd experiment examined the influence of altered ...
British scientists say they have created a sensor capable of measuring localized ultrasonic cavitations in research that will help hospitals remain hygienic.. Cavitations occur when bubbles implode in a liquid when a high frequency sound wave is applied. The researchers said their sensor, the first of its kind, will help hospitals ensure that their instruments are properly disinfected before they are used on patients.. Cavitation is used throughout the United Kingdoms National Health Service by doctors and dentists to clean and disinfect surgical instruments. A high frequency sound wave is passed through a disinfecting liquid to create bubbles that implode. The force of each implosion removes contaminate particles from surrounding materials.. Until now there has been no accurate method of identifying how much cavitation takes place at different locations in a cleaning system, and therefore no measurable way to ensure the cleaning process is effective. The researchers said the new sensor, ...
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The College of Sound Healing offers Sound Healing with qualified Sound Healers, healing with Sound and Sound Therapy, and Sound Healing Training for you to learn Healing with the Voice. The College of Sound Healing web site includes links to qualified practitioners and further resources.
Start your sound effects search by typing in a keyword in the panel above - or browsing through a sound effects category below. When you find what youre looking for, purchase and download sound effects immediately - fully licensed for use in your productions. All sound effects downloads are available in both WAV and MP3 formats here at StockMusic.com. Your single sound effects purchase entitles you to download both files - as many times as you want. And our standard license entitles you to use the same files as many times as you want for no extra fee. Selected Sound Effects CDs are also Available to Purchase for Download as zip files - scroll down this page to see some of the available selections ...
Start your sound effects search by typing in a keyword in the panel above - or browsing through a sound effects category below. When you find what youre looking for, purchase and download sound effects immediately - fully licensed for use in your productions. All sound effects downloads are available in both WAV and MP3 formats here at StockMusic.com. Your single sound effects purchase entitles you to download both files - as many times as you want. And our standard license entitles you to use the same files as many times as you want for no extra fee. Selected Sound Effects CDs are also Available to Purchase for Download as zip files - scroll down this page to see some of the available selections ...
The wax moth doesnt hear equally well across the range. It is particularly good at picking up sounds in the 60 kHz range. For the wax moths to hear the end frequency sounds, they have to be much louder. At 60 kHz, the wax moths can pick up sounds of a volume about 50 decibels of sound pressure level (dB SPL); at 300 kHz, the sound has to be more like 90 dB SPL. Thats a loud sound. And at the very high end (280-300 kHz), some of the moths dont respond at all to even loud sounds, suggesting this is near the upper limit of their hearing ...
A microphone comprises a housing defining an inner volume and including a first exterior surface with an aperture leading to the inner volume. The microphone includes a transducing assembly within the housing for converting sound into an electrical signal. A sound inlet plate defines, typically in combination with the first exterior surface, a passageway for transmitting sound to the aperture The passageway receives the sound from an opening in the sound inlet plate. The opening is offset from the location at which the aperture is positioned on the exterior surface. The sound inlet plate is made very thin so that it does not extend substantially away from the housing.
Ultrasonic testing uses the same principle as is used in naval SONAR and fish finders. Ultra-high frequency sound is introduced into the part being inspected and if the sound hits a material with a different acoustic impedance (density and acoustic velocity), some of the sound will reflect back to the sending unit and can be presented on a visual display. By knowing the speed of the sound through the part (the acoustic velocity) and the time required for the sound to return to the sending unit, the distance to the reflector (the indication with the different acoustic impedance) can be determined. The most common sound frequencies used in UT are between 1.0 and 10.0 MHz, which are too high to be heard and do not travel through air. The lower frequencies have greater penetrating power but less sensitivity (the ability to "see" small indications), while the higher frequencies dont penetrate as deeply but can detect smaller indications.. The two most commonly used types of sound waves used in ...
Ultrasonic testing uses the same principle as is used in naval SONAR and fish finders. Ultra-high frequency sound is introduced into the part being inspected and if the sound hits a material with a different acoustic impedance (density and acoustic velocity), some of the sound will reflect back to the sending unit and can be presented on a visual display. By knowing the speed of the sound through the part (the acoustic velocity) and the time required for the sound to return to the sending unit, the distance to the reflector (the indication with the different acoustic impedance) can be determined. The most common sound frequencies used in UT are between 1.0 and 10.0 MHz, which are too high to be heard and do not travel through air. The lower frequencies have greater penetrating power but less sensitivity (the ability to "see" small indications), while the higher frequencies dont penetrate as deeply but can detect smaller indications.. The two most commonly used types of sound waves used in ...
The Hearing Loss Association of America (HLAA) is a tax-exempt, charitable organization and is eligible to receive tax deductible contributions under the IRS Code 501(c)(3). Mention of products or services on this website does not imply HLAA endorsement, nor does exclusion suggest disapproval. ...
interaural time disparities (ITDs) are the main cue that animals use to localize low frequency sounds. Many features of neural circuitry that process this cue are similar between birds and mammals. For example, both systems involve specialized coincidence-detecting neurons that detect the timing differences of spikes arriving from both ears. These neurons comprise the medial superior olive in mammals (Goldberg and Brown 1969; Yin and Chan 1990) and nucleus laminaris (NL) in birds (Parks and Rubel 1975; Sullivan and Konishi 1986; Carr and Konishi 1990; Peña et al. 1996; Burger and Rubel 2008; Grothe et al. 2010). Additionally, both systems include inhibitory feedback pathways to monaural and binaural processing centers originating from one or more nuclei located in the superior olive (Caspary et al. 1994; Lachica et al. 1994; Ebert and Ostwald 1995a,b; Westerberg and Schwarz 1995; Smith et al. 1998; Backoff et al. 1999; Yang et al. 1999; Kopp-Scheinpflug et al. 2002; Burger et al. 2005).. In ...
Woo, et. al. in 2017 cited shear-wave elastography (SWE) as a promising way to detect prostate cancer. Out of eight studies involved in their research, they found that SWE was able to show good diagnostic performance in diagnosis cases of prostate cancer. [5]. On a similar note, Gomez, Gus, and Saffari found that diagnosing prostate cancer with shear was not only feasible, but it was safe as well. The trouble with using high-intensity sound waves from typical ultrasound machines is that it can cause minute damage to tissue because artificially produced sound waves also produce heat, which can cause tissue damage or ablation. Gomez, Gus, and Safarri found that shear waves do not cause ablation because S-waves are produced by the tissue themselves and merely "pass the wave on" to surrounding tissues to generate more waves. [6]. Chang, et. al. in 2011 publishes a study on SWE and diagnosis of benign and malignant breast conditions, concluding that the emerging technique was able to differentiate ...
Solta Medical, Inc.. (NASDAQ: SLTM), a global leader in the medical aesthetics market, today announced it has entered into a definitive agreement to acquire privately-held Sound Surgical Technologies LLC. Under the terms of the agreement, Solta will acquire Louisville, Colorado-based Sound Surgical for $25.5 million in Solta common stock and $5.0 million in cash. Excluding acquisition and integration related charges, the transaction is expected to be accretive to Solta Medicals quarterly earnings within twelve months.. In addition to the payments due at closing, Sound Surgical unit holders are entitled to receive up to $9.5 million of contingent payments that would be paid in Solta common stock based on revenue from Sound Surgical products in 2013. The proposed transaction becomes increasingly accretive to Solta Medical as Sound Surgical achieves the higher end of the revenue range. Approximately three-quarters of Sound Surgical unit holders have entered into staggered lock-up agreements ...
Chameleons do not have external ears or a tympanic membrane, but they do have internal ears as well as degenerated middle ears. They do not hear well but they can detect low frequency sounds ...
Recent human behavioral studies have shown semantic and/or lexical processing for stimuli presented below the auditory perceptionthreshold. Here, we investigated electroencephalographic responses to words, pseudo-words and complex sounds, in conditionswhere phonological and lexical categorizations were behaviorally successful (categorized stimuli) or unsuccessful(uncategorized stimuli). Data showed a greater decrease in low-beta power at left-hemisphere temporal electrodes for categorizednon-lexical sounds (complex sounds and pseudo-words) than for categorized lexical sounds (words), consistent with the signatureof a failure in lexical access. Similar differences between lexical and non-lexical sounds were observed for uncategorized stimuli,although these stimuli did not yield evoked potentials or theta activity. The results of the present study suggest that behaviorallyuncategorized stimuli were processed at the lexical level, and provide evidence of the neural bases of the results observed in ...
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