Acoustic characteristics. Medical search. Frequent questions

RESULTS: Of the 16 acoustic schwannomas with MR evidence of intramural cysts, 11 tumors had single small cysts, and five had multiple intramural cysts of variable size. (lokmanhekim.edu.tr)
As a result, stereotactic radiation has become a viable and useful primary management alternative for patients with cerebellopontine angle and/or skull base tumors , including acoustic neuromas (also known as vestibular schwannomas), meningiomas , and paragangliomas. (medscape.com)
it provides a basic introduction of the technology available, the applications in the management of acoustic neuromas (including the role of the neurotologist/ neurosurgeon in treatment planning), and the controversies regarding the use of radiation for the management of these tumors. (medscape.com)
Research suggests that the loss of merlin allows cells, especially Schwann cells, to multiply too frequently and form the tumors characteristic of neurofibromatosis type 2. (medlineplus.gov)
Almost everyone who is born with one NF2 variant acquires a second variant (known as a somatic variant) in these cells and develops the tumors characteristic of neurofibromatosis type 2. (medlineplus.gov)

An acoustic neuroma is also known as a schwannoma, vestibular schwannoma, or neurilemmoma. (braintumor.org)
PURPOSE: To evaluate the spectrum of MR characteristics of cystic acoustic schwannoma and to investigate its incidence. (lokmanhekim.edu.tr)

This focused, high-energy radiation prevents the growth of acoustic neuromas, but actual shrinkage of the tumor may never occur or may take several months. (braintumor.org)
An additional reference for neurotologists and neurosurgeons treating acoustic neuromas is The International RadioSurgery Association, which has established practice guidelines for stereotactic radiosurgery for patients with acoustic neuroma. (medscape.com)
As a side note, meningiomas and acoustic neuromas were not treated with traditional radiation therapy because they were thought to be radiation resistant and because of their proximity to vital neurovascular structures and contact with the brain stem. (medscape.com)

The various data relating to acoustic absorption (αp, αw, absorption class) have been calculated according to ISO 11654 standard (LINEA + acoustic supplement). (laudescher.com)
It is not intended to be used for measuring the absorption characteristics of weakly damped resonators. (saiglobal.com)
Thinsulate acoustic insulation has extremely efficient sound absorption properties, allowing OEMs to use only what they need to make a difference in sound abatement. (3m.com)
The polypropylene fibers are extremely fine, producing a high-energy absorption characteristic with low weight. (3m.com)
Provides highly efficient acoustic absorption, particularly in middle- to high-frequency ranges. (3m.com)

The vestibular and cochlear (acoustic) ganglia neuroblasts are derived almost exclusively from the otocyst epithelium, in contrast to other cranial sensory ganglia in which both ganglionic and neural crest placodes make extensive contributions to the neuroblast populations. (medscape.com)
Illustration showing that almost all neurons in the vestibular and acoustic ganglia are derived from the otocyst as placodal neurons. (medscape.com)

The propagation of acoustic waves in the ocean strongly depends on the temperature. (knmi.nl)
Low-frequency acoustic waves can penetrate the ocean down to depths where few in situ measurements are available. (knmi.nl)
It is therefore attractive to obtain a measure of the deep ocean temperature from acoustic waves. (knmi.nl)
Velocity of bulk acoustic waves in base and rotated cuts have been measured by the ultrasonic pulse-echo method and values of CE ijkl and eijk in single crystals YAl3(BO3)4 have been calculated. (sfu-kras.ru)
The pulsations are mainly dominated by the standing waves, which are expressed by the acoustic characteristics. (sae.org)
These acoustic waves oscillate at differing frequencies. (3m.com)

Cystic acoustic schwannomas: MR characteristics. (ajnr.org)
METHODS: We retrospectively reviewed the MR findings and clinical records of 16 patients with cystic acoustic schwannomas. (lokmanhekim.edu.tr)
In addition, the MR examinations of 411 consecutive patients referred for clinical suspicion of acoustic schwannomas were reviewed retrospectively to assess the incidence of acoustic schwannomas with cystic lesions arising from the internal auditory canal. (lokmanhekim.edu.tr)
Nine of the 16 cystic acoustic schwannomas also had MR evidence of extramural/arachnoid cysts. (lokmanhekim.edu.tr)
CONCLUSION: Our series suggests that cystic changes in acoustic schwannomas and the association with extramural/arachnoid cysts are not as rare as previously reported by other diagnostic methods. (lokmanhekim.edu.tr)

An acoustic neuroma may be observed in order to monitor its growth, or surgery may be performed. (braintumor.org)
A small acoustic neuroma within the internal auditory canal is easily observed on postgadolinium MRI. (medscape.com)

Then, the mechanical, acoustic emission (AE), energy response characteristics and failure modes of the cavern model with different fault angles are explored. (researchsquare.com)
12 ] used fractal theory to calculate the correlation between stress and acoustic emission data synchronization. (hindawi.com)
The results showed that the fractal characteristics of stress and acoustic emission coupling characteristics become more obvious with the increase of the correlation dimension. (hindawi.com)
13 ] evaluated the acoustic emission signal of coal fracture under uniaxial compression, combined with fractal theory to analyze the frequency spectrum, energy, and fractal characteristics of acoustic emission waveforms under different stress levels. (hindawi.com)

Another approach that was recently adopted by the U.S. Department of Defense is the Auditory Hazard Assessment Algorithm for Humans (AHAAH), an electro-acoustic model of the ear that assigns "Auditory Hazard Units" to an impulsive exposure [DOD 2015]. (cdc.gov)

A deep-water acoustic observatory for real-time detection and localization of vocalizing sperm whales was developed, deployed and operated for two 3-month periods in summer 2020 and 2021, off south-west Crete in the Eastern Mediterranean Sea, in the framework of the SAvEWhales project. (frontiersin.org)
2020 ) studied the failure characteristics of deep circular tunnel in rock mass with multiple weak surfaces by using two-dimensional combined finite element method / discrete element method (FEM / DEM). (researchsquare.com)

Attach our acoustic insulation using a variety of methods including ultrasonic welding, double-sided tape or mechanical clips. (3m.com)
Dynamic mechanical characteristics and energy consumption regularities of rocks are involved in various engineering fields and natural disasters, such as roadway excavation, hydraulic engineering excavation, underground mine mining, earthquakes, and landslides. (hindawi.com)
therefore, the split Hopkinson pressure bar (SHPB) test is used to study the dynamic mechanical characteristics of rock [ 5 , 6 ]. (hindawi.com)
So far, there have been many valuable research results on the dynamic mechanical characteristics and energy dissipation regularities of rocks [ 7 ]. (hindawi.com)
Exposure to high-intensity impulses can cause acoustic trauma and instant mechanical damage to the inner ear. (cdc.gov)

We combined a dual-frequency hydro-acoustic (38 & 200 kHz) sediment classification approach with rheological measurements using a dynamic penetrometer. (iahr.org)
An important aspect of speech perception is the ability to group or select formants using cues in the acoustic source characteristics-for example, fundamental frequency (F0) differences between formants promote their segregation. (aston.ac.uk)
If the frequency of the acoustic wave is near the anti-resonance frequency of the piezoelectric vibrator, the displacement amplitude of the piezoelectric vibrator increases greatly. (extrica.com)
pioneered the development of small vibration piezoelectric generator principle prototype [4, 5], Wang Gensheng discovered the frequency characteristics of the air acoustic piezoelectric generator through experiments, and provided guidance for the circuit design [6]. (extrica.com)
Our automotive acoustic insulation is made from a unique combination of fine microfibers that absorb high frequency noise and thicker fibers that provide recovery and loft. (3m.com)

A set of significant correlations between acoustic backscatter parameters and physical sediment properties (undrained shear strength and cone penetration resistance) allow for a detailed characterization of the sediment composition (grain size, density). (iahr.org)
Based on the regressions between hydro-acoustic and physical/rheological parameters, the local characteristics were extrapolated over the reservoir surface by conducting hydro-acoustic surveys. (iahr.org)
And the pitch, energy and duration of negative emotion acoustic parameters are bigger than positive emotion, on this basis, drawing the Lhasa Tibetan speech emotion acoustic feature patterns. (shs-conferences.org)
Estimating three-dimensional motion parameters of a rigid planar patch, ii: singular value decomposition.IEEE Transactions on Acoustic, Speech and Signal Processing. (crossref.org)
From this point of view, authors have developed an experimental method to analyze the standing wave and the acoustic transfer matrix, which is characterized as the four-pole parameters of the air column in an intake and exhaust system. (sae.org)
At the level of communities of signaling animals, these processes may lead to diverse outcomes, including partitioning of acoustic signals along multiple axes (divergent signal parameters, signaling locations, and timing). (frontiersin.org)
The term "acoustic community structure" ( Table 1 ) adapts the concept of ecological community structure, employing acoustic parameters and signaling activity as measurable traits to examine the distribution of sound-producing species in signal space, together with measures of species composition and phylogenetic diversity. (frontiersin.org)

Aiming at the problem of insufficient power supply in modern intelligent fuze, it is of great theoretical significance and practical guidance to study the relationship between acoustic vibration response and power generation characteristics of airborne piezoelectric generators and maximum energy output. (extrica.com)
The airflow acoustic piezoelectric generator can use the air against the projectile during the flight and convert the environmental energy during the flight into a pulsating sinusoidal vibration excitation [1, 2], and then output power through the transducing mechanism. (extrica.com)
Therefore, it is of great significance to study the relationship between acoustic vibration response and power generation characteristics of the airflow acoustic piezoelectric generator and the output of the maximum energy. (extrica.com)

The latter is especially true if the ambient acoustic noise field can be used instead of deterministic transient signals. (knmi.nl)
The presented meta-analysis of data collected during a systematic review of concrete, metal, and wood panels' acoustic and non-acoustic characteristics, long term performance, and cradle-to-gate sustainability aims to reduce this uncertainty and support the process of noise wall design and management by shifting the emphasis in decision making from construction costs to the long-term sustainability of the road traffic noise mitigation project. (mdpi.com)
In natural listening situations, we are surprisingly efficient in selecting, grouping and processing relevant acoustic elements of a sound while ignoring other elements of the same sound and the possible interference of background noise. (jneurosci.org)
To make the ride in vehicles more comfortable for passengers, 3M™ Thinsulate™ Acoustic Insulation SM300L (PDF, 287.4 Kb) absorbs noise so that it is quieter in the interior of vehicles. (3m.com)
Acoustic characteristics analysis of jumbo drill noise. (cdc.gov)
OBJECTIVE: To characterise the performance of hearing protection devices (HPDs) in impulsive-noise conditions and to compare various protection metrics between impulsive and steady-state noise sources with different characteristics. (cdc.gov)

Compared with the Chinese language and the Tibetan, even though both have the tone prosodic features, they also have significant differences in the acoustic characteristics of the speech emotion. (shs-conferences.org)
Acoustic properties of Serbian EFL students' speech. (org.rs)
Selective grouping and processing of specific acoustic elements is also pertinent to the extraction of different types of information from complex and socially relevant signals such as speech. (jneurosci.org)
The overarching goal of the Speech Acoustics Lab is to contribute to our understanding of speech production characteristics, speech motor control, and motor speech disorders. (jmu.edu)
In addition to acoustic examination of speech, more recently, the Speech Acoustics Lab has also developed a protocol for speech kinematic research with the use of the Wave electromagnetic articulograph speech research system (Northern Digital Inc. (jmu.edu)
Kuo, C . (Principal Investigator) & Barrett, M. "Characteristics and clinical correlates of speech impairment in Parkinson's disease. (jmu.edu)

Kojima and Yashiro ( 2005 ) established a method to evaluate the deformation characteristics of tunnel under the action of embankment and surface excavation through surface loading and unloading model test. (researchsquare.com)

3M™ Thinsulate™ Acoustic Insulation SM300L absorbs sounds to provide superior acoustic control in vehicles. (3m.com)
Our automotive acoustic insulation can be used for a variety of sound management applications. (3m.com)
Our insulation is a unique non-woven acoustic absorber composed of polyester and polypropylene fibers. (3m.com)
Depending on application requirements, 3M™ Thinsulate™ Acoustic Insulation SM300L may be evaluated for use in the carpet/dashmat, door panels, headliners and other variable cavity applications. (3m.com)
Thinsulate acoustic insulation products are made from lightweight polyester and polypropylene non-woven fibers. (3m.com)
Thinsulate acoustic insulation is also resistant to mildew growth, reducing the risk of offensive odors. (3m.com)
Thinsulate acoustic insulation is supported by a global network of 3M experts. (3m.com)
This acoustic insulation material has a caliper of 21 mm and a basis weight of 342 gm/m2. (3m.com)

Acoustic and kinematic vowel space areas associated with varied intelligibility. (jmu.edu)

Protectors were measured with impulses generated by both an acoustic shock tube and an AR-15 rifle. (cdc.gov)

Zero acoustic impedance can be produced at discrete frequencies by using quarter-wave resonators. (aes.org)

The purpose of this study is to investigate the acoustic realization of American English vowels in a group of Serbian EFL learners from an urban area in Central Serbia and compare them to the native speakers' vowel production. (org.rs)
A comparative acoustic study of English and Spanish vowels. (org.rs)
1995. Acoustic Characteristics of American English Vowels. (org.rs)

In this study the acoustic velocity, and hence the temperature, is derived in an interferometric approach from hydrophone array recordings. (knmi.nl)

The acoustic sound quality especially seems to sometimes be particularly close to that of human voices. (acoustics.org)
Recent studies have suggested that the acoustic characteristics of snoring sound may differ between simple snorers and OSA patients. (researchgate.net)
We have studied a small number of patients with simple snoring and OSA, analysing the acoustic characteristics of the snoring sound. (researchgate.net)
The acoustic environment in which the mining machine operates is a critical factor affecting the sound pressure levels measured at an operator's location. (cdc.gov)
Subjective tinnitus is perception of sound in the absence of an acoustic stimulus and is heard only by the patient. (msdmanuals.com)
Within the groups involved in the Sound Environmental Center, acoustic research is going on at the acoustics groups at LTH (in Lund) and at DTU (the Technical University of Denmark, in Lyngby, Demark). (lu.se)

We analyze the clinical diagnosis and treatment process and characteristics of this group of patients combined with previous literature to provide a reference for the diagnosis and treatment of such patients. (bvsalud.org)

Patients and Methods: Acoustic and EGG findings were compared among 5 groups of participants. (edu.au)

However, despite strong scientific and practical importance, conclusive experimental evidence of confined acoustic phonon polarization branches in individual free-standing nanostructures is lacking. (nature.com)
Here we report results of Brillouin-Mandelstam light scattering spectroscopy, which reveal multiple (up to ten) confined acoustic phonon polarization branches in GaAs nanowires with a diameter as large as 128 nm, at a length scale that exceeds the grey phonon mean-free path in this material by almost an order-of-magnitude. (nature.com)

Acoustic Investigations of Serbian and American English Vowel Inventories. (org.rs)

Distinguishing ballistic arrivals (from the cylindrical shock of the fireball) from fragmentation generated signals (quasi-spherical sources) remains a challenge, but are obtainable through analysis of the acoustic path and the timing observed at ground instruments. (meteornews.net)
Acoustic Analysis. (org.rs)
Kurata, K. and Miyake, K., "Experimental Acoustic Analysis of the Intake and Exhaust System to Predict Insertion Loss and Engine Performance," SAE Technical Paper 931903, 1993, https://doi.org/10.4271/931903 . (sae.org)
We used random forest analysis to identify patient characteristics and influenza activity indicators that were most important in terms of their relationship to influenza testing. (cdc.gov)

This study explored the role of more radical differences in source characteristics. (aston.ac.uk)
This study investigated acoustic and EGG voice features of CC and PVFM. (edu.au)
Acoustic data provides information on the organization, diversity and dynamics of an acoustic community, and thus enables study of ecological change and turnover in a non-intrusive way. (frontiersin.org)
In this review, we lay out how community bioacoustics (the study of acoustic community structure and dynamics), has value in ecological monitoring and conservation of diverse landscapes and taxa. (frontiersin.org)
A descriptive study on the acoustic and kinematic characteristics of internal open junctures: Implications for highly intelligible individuals with Parkinson's disease. (jmu.edu)
A pilot study on the acoustic characteristics of ambiguous sentences in highly intelligible individuals with Parkinson's disease. (jmu.edu)
Therefore, it is of great engineering significance to study the unloading response characteristics of cross fault caverns for the safety control of underground space. (researchsquare.com)

This characteristic can be used to solve the piezoelectric stress factor under different initial conditions from the experimental point of view. (extrica.com)
Thus, the airflow acoustic piezoelectric generator is one of the new fuse power sources that can effectively solve the problem of insufficient power supply for fuse. (extrica.com)

Think of the acoustic guitar as a signal chain: the very first thing the string resonates against is the saddle. (musicradar.com)

For example, choose restaurants with better lighting or meeting rooms with carpeted floors and acoustic ceiling tiles that reduce the echo (or reverberation) in a room. (cdc.gov)

Information" here refers to the characteristic acoustic properties that are specific to every space. (ycam.jp)

The diversity of animal acoustic signals has evolved due to multiple ecological processes, both biotic and abiotic. (frontiersin.org)
Next, we highlight how spatiotemporal ecological change is reflected in acoustic community structure, and the potential this presents in monitoring and conservation. (frontiersin.org)
The wealth of data generated by passive acoustic monitoring efforts promises valuable ecological insight, both into the distributions and movements of individual species as well as community-level processes such as seasonal turnover. (frontiersin.org)
Here, we discuss how ecological processes drive acoustic community structure, and propose using acoustic communities to track ecological change. (frontiersin.org)

As passive acoustic monitoring gains popularity worldwide, we propose that the analytical framework of community bioacoustics has promise in studying the response of entire suites of species (from insects to large whales) to rapid anthropogenic change. (frontiersin.org)

The use of the penetrometer for ground truthing helped to identify the influence of gas voids in the sediment, which strongly changes the acoustic response. (iahr.org)

We develop a new methodology for measuring energy release from bolide fragmentation episodes solely from acoustic measurements and incorporate this into BAM. (meteornews.net)

Applying BAM to the Stubenberg meteorite producing fireball, we find the total fireball energy from ballistic arrivals to be approximately 5 × 10^10 J which compares favorably to the optical estimate of 4.36 × 10^10 J. The combined fragmentation energy of the Stubenberg event from acoustic data was found to be 1.47[+0.28 −0.12] × 10^10 J, roughly one third of the ballistic or optical total energy. (meteornews.net)
The test results showed that the fragments produced by rock fragmentation under impact load have fractal characteristics. (hindawi.com)

The obtained results can lead to more efficient nanoscale control of acoustic phonons, with benefits for nanoelectronic, thermoelectric and spintronic devices. (nature.com)
The design and implementation, as well as results from the operation and validation of the acoustic observatory are presented. (frontiersin.org)

We also explore the sensitivity of seismo-acoustic fireball solutions and energy estimates to uncertainty in the underlying atmospheric model. (meteornews.net)

The research of unloading response characteristics of caverns with weak structure has important engineering value for the development and construction of underground space. (researchsquare.com)
To address the periodic pattern order to develop a robust and effective procedure exploiting of the elastic echoes, we model them as signal blocks, which the scattered acoustic response, it is necessary to model may then be estimated exploiting a developed block sparse the relationship between the characteristics of the scattering approach. (lu.se)

We also show that measuring fireball velocities from acoustic data alone is very challenging but may be possible for slow, deeply penetrating fireballs with shallow entry angles occurring over dense seismic/infrasound networks. (meteornews.net)

First, we review the concepts of signal space, signal partitioning and their effects on the structure of acoustic communities. (frontiersin.org)

Despite the strong motivations, and a large body of theoretical studies 10 , 11 , experimental investigation of the acoustic phonon confinement effects in individual nanostructures-as opposed to periodic composites-is lagging behind. (nature.com)

We have done a lot of research to find the top 20 Ovation Applause Ae 28 Acoustic Electric Guitar available. (remixmag.com)

Similarly, recognizing a voice requires extracting speaker specific acoustic characteristics (e.g. (jneurosci.org)

Acoustic characteristics of public speaking: Anxiety and practice effects. (bvsalud.org)

The physical characteristics of a room can make it easier or harder to hear. (cdc.gov)
The Bureau of Mines investigated the physical characteristics of and roof instability problems associated with clay veins. (cdc.gov)

Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects. (musiciansfriend.com)

Analytical, Diagnostic and Therapeutic Techniques and Equipment2

Psychiatry and Psychology1

Phenomena and Processes2

Disciplines and Occupations1

Tumors5

Schwannoma2

Neuromas3

Absorption5

Vestibular2

Waves6

Cystic5

Neuroma2

Emission4

Auditory1

20202

Mechanical5

Frequency5

Parameters7

Vibration3

Noise6

Speech6

Surface1

Insulation8

Intelligibility1

Impulses1

Frequencies1

Vowels3

Velocity1

Sound6

Clinical1

METHODS1

Polarization2

Investigations1

Analysis4

Study7

Solve2

Saddle1

Tiles1

Properties1

Ecological4

Species1

Strongly1

Measurements1

Fragmentation2

RESULTS2

Energy1

Response2

Data1

Signal1

Experimental1

Research1

Voice1

Practice1

Physical2

Open1