Effects of Sound on Fish - Alaska Resources Library and Information
... this table is presented in much greater detail in Section V of this report (Table 5, page 49), and summarized in Figure 9 (page 73). It is important to note, as discussed in detail in Section V (page 42), that the body of scientific and commercial data currently available is inadequate for the purp ...
... this table is presented in much greater detail in Section V of this report (Table 5, page 49), and summarized in Figure 9 (page 73). It is important to note, as discussed in detail in Section V (page 42), that the body of scientific and commercial data currently available is inadequate for the purp ...
ABSTRACT SOUND LOCALIZATION BY ECHOLOCATING BATS Murat Aytekin, Doctor of Philosophy, 2007
... role of action in building a representation of auditory space. The general importance of this work to a broader understanding of spatial localization is discussed. Investigations of the directional properties of the sonar receiver reveal that interaural level difference and monaural spectral notch c ...
... role of action in building a representation of auditory space. The general importance of this work to a broader understanding of spatial localization is discussed. Investigations of the directional properties of the sonar receiver reveal that interaural level difference and monaural spectral notch c ...
Phase Locking to High Frequencies in the Auditory Nerve and
... sudden negative change of the DC potential coincident with the appearance of spikes. After isolating a unit, the response to ipsilateral condensation clicks was usually recorded first. This was followed by the presentation of a frequency intensity raster of tone bursts at minimally 10 frequencies ar ...
... sudden negative change of the DC potential coincident with the appearance of spikes. After isolating a unit, the response to ipsilateral condensation clicks was usually recorded first. This was followed by the presentation of a frequency intensity raster of tone bursts at minimally 10 frequencies ar ...
T The Effects of Noise-Induced Hearing Loss on Children and
... risk criteria” (DRC) described the appropriate maximum sound levels and durations of exposure, with time–intensity trading ratios that would suggest equal risk for NIHL for different durations of exposure. For instance, the National Institute for Occupational Safety and Health (NIOSH, 1998) recommen ...
... risk criteria” (DRC) described the appropriate maximum sound levels and durations of exposure, with time–intensity trading ratios that would suggest equal risk for NIHL for different durations of exposure. For instance, the National Institute for Occupational Safety and Health (NIOSH, 1998) recommen ...
Individual monitoring of hearing status - CRITIAS
... While the noise reduction algorithm and the involved hardware does lower the noise floor and increase the DPOAE level reliability, it is still necessary to find an alternative to FFT based DPOAE level extraction because the FFT is very sensitive to background noise in frequency bins near the DPOAE f ...
... While the noise reduction algorithm and the involved hardware does lower the noise floor and increase the DPOAE level reliability, it is still necessary to find an alternative to FFT based DPOAE level extraction because the FFT is very sensitive to background noise in frequency bins near the DPOAE f ...
The cochlea as a smart structure
... ionic flow generates a voltage within the hair cell, due to its internal capacitance. In the inner hair cells, this voltage causes the cell to release a chemical neurotransmitter. When this neurotransmitter binds to receptors on nearby nerve fibres, it produces voltage changes in the fibres that, on ...
... ionic flow generates a voltage within the hair cell, due to its internal capacitance. In the inner hair cells, this voltage causes the cell to release a chemical neurotransmitter. When this neurotransmitter binds to receptors on nearby nerve fibres, it produces voltage changes in the fibres that, on ...
Transmission of bone-conducted sound in the human skull
... properties of the skull and you can see a free oscillation after excitation. A free resonance can be either a resonance or an anti-resonance. There have been numerous of reports on skull resonances. In the early research only a limited range of frequencies was investigated. The vast majority have be ...
... properties of the skull and you can see a free oscillation after excitation. A free resonance can be either a resonance or an anti-resonance. There have been numerous of reports on skull resonances. In the early research only a limited range of frequencies was investigated. The vast majority have be ...
NOISE LEVELS OF COMMON CONSTRUCTION POWER TOOLS
... only 3 decibels. Conversely, if the noise level in the plant exceeds allowable standards by very much, shutting off half the machines in the plant – an obviously drastic measure – may have very little effect in bringing down the total noise level on the decibel scale. Table 2.1 provides a scale for ...
... only 3 decibels. Conversely, if the noise level in the plant exceeds allowable standards by very much, shutting off half the machines in the plant – an obviously drastic measure – may have very little effect in bringing down the total noise level on the decibel scale. Table 2.1 provides a scale for ...
Effects of Noise Induced Hearing Loss
... risk criteria” (DRC) described the appropriate maximum sound levels and durations of exposure, with time–intensity trading ratios that would suggest equal risk for NIHL for different durations of exposure. For instance, the National Institute for Occupational Safety and Health (NIOSH, 1998) recommen ...
... risk criteria” (DRC) described the appropriate maximum sound levels and durations of exposure, with time–intensity trading ratios that would suggest equal risk for NIHL for different durations of exposure. For instance, the National Institute for Occupational Safety and Health (NIOSH, 1998) recommen ...
Low body mass index and jaw movement are protective of hearing
... and maximum volume, respectively) than that of “without jaw movement” (mean 5 80.1 and 99.5 dB SPL for loud and maximum volume, P 5 0.01 and P < 0.001, respectively; Table I). The sound pressure levels for the “crescendo” excerpt of the music were also significantly lower in the condition of “jaw mo ...
... and maximum volume, respectively) than that of “without jaw movement” (mean 5 80.1 and 99.5 dB SPL for loud and maximum volume, P 5 0.01 and P < 0.001, respectively; Table I). The sound pressure levels for the “crescendo” excerpt of the music were also significantly lower in the condition of “jaw mo ...
Initial Clinical Experience With a Totally Implantable Cochlear
... microphone signal was streamed from the implant via telemetry. The overall response of the implanted microphone was calculated by subtracting the response of a reference microphone (placed near the implant site) from the streamed-out spectrum. Battery testing showed that battery autonomy of 35, 23, ...
... microphone signal was streamed from the implant via telemetry. The overall response of the implanted microphone was calculated by subtracting the response of a reference microphone (placed near the implant site) from the streamed-out spectrum. Battery testing showed that battery autonomy of 35, 23, ...
Anatomy of the Ear
... information and it is compared to normal responses. This procedure does not cause any discomfort to the person. The test takes approximately one to two hours ...
... information and it is compared to normal responses. This procedure does not cause any discomfort to the person. The test takes approximately one to two hours ...
Multicenter Study With a Direct Acoustic Cochlear Implant
... sensorineural hearing loss. The coupling of MEI to the inner ear is also an important issue for effectiveness. A more efficient approach might be to bypass the natural sound transmission structures of the ear and directly provide an amplified signal to the cochlea. In this approach, conductive losse ...
... sensorineural hearing loss. The coupling of MEI to the inner ear is also an important issue for effectiveness. A more efficient approach might be to bypass the natural sound transmission structures of the ear and directly provide an amplified signal to the cochlea. In this approach, conductive losse ...
Diagnosis and Treatment of Severe High Frequency Hearing Loss
... membrane activity (at the test frequency place) will therefore also create activation at other frequency places, possibly places with enough function to result in neural firing. This by-product response may be enough to cause the listener to respond during audiometry by indicating that a sound was h ...
... membrane activity (at the test frequency place) will therefore also create activation at other frequency places, possibly places with enough function to result in neural firing. This by-product response may be enough to cause the listener to respond during audiometry by indicating that a sound was h ...
4 exposure criteria, occupational exposure levels
... Permanent noise-induced hearing loss is related to the sound pressure level and frequency distribution of the noise, the time pattern and duration of exposure, and individual susceptibility. The ability to hear and understand everyday speech under normal conditions is regarded as the most important ...
... Permanent noise-induced hearing loss is related to the sound pressure level and frequency distribution of the noise, the time pattern and duration of exposure, and individual susceptibility. The ability to hear and understand everyday speech under normal conditions is regarded as the most important ...
So How Good are These Smartphone Sound
... testing. As a result, a comprehensive experimental design and analysis similar to the iOS devices and apps study above was not possible. In addition to the low number of apps available with similar functionality, there was a high variance in measurements and a lack of conformity of features of the s ...
... testing. As a result, a comprehensive experimental design and analysis similar to the iOS devices and apps study above was not possible. In addition to the low number of apps available with similar functionality, there was a high variance in measurements and a lack of conformity of features of the s ...
Assistive Listening Devices
... the receivers worn by the child. The receivers have the ability to decode the FM frequency waves. The receivers can be built into the child’s hearing aid or clipped on to the hearing aid. There are many advantages to this system. There are no spillover problems, it is portable and it improves the si ...
... the receivers worn by the child. The receivers have the ability to decode the FM frequency waves. The receivers can be built into the child’s hearing aid or clipped on to the hearing aid. There are many advantages to this system. There are no spillover problems, it is portable and it improves the si ...
GS3412321244
... degenerate (ASHA). This is why, over time, humans lose their abilities to hear high frequencies, which require more hair cells in the cochlea. Testing higher frequencies allows for users to simply track how much SSHL they have obtained over time and estimate how much hearing they may lose in the fut ...
... degenerate (ASHA). This is why, over time, humans lose their abilities to hear high frequencies, which require more hair cells in the cochlea. Testing higher frequencies allows for users to simply track how much SSHL they have obtained over time and estimate how much hearing they may lose in the fut ...
Specific Findings in Distortion Product Otoacoustic Emissions and
... and approximately 4% suffer from tinnitus to an extent requiring special intervention . Of these , 1.5% reported that their daily life was greatly affected by the tinnitus, and some 1% believed that it interfered with their occupation . These data, published by the German Tinnitus League (DTL) [1], ...
... and approximately 4% suffer from tinnitus to an extent requiring special intervention . Of these , 1.5% reported that their daily life was greatly affected by the tinnitus, and some 1% believed that it interfered with their occupation . These data, published by the German Tinnitus League (DTL) [1], ...
Skills Lab OAESchoolNurses2010
... low (usually less than – 10 dB SPL) to permit confident detection of OAE activity and the stimulus intensity levels in the ear canal should be close to the desired (target) levels. OAE devices invariably perform a quick calibration of stimulus intensity levels prior to data collection. The next step ...
... low (usually less than – 10 dB SPL) to permit confident detection of OAE activity and the stimulus intensity levels in the ear canal should be close to the desired (target) levels. OAE devices invariably perform a quick calibration of stimulus intensity levels prior to data collection. The next step ...
Martin L. Lenhardt, Au.D., Ph.D. Tinnitus Devices
... binaurally. What is astonishing about the perception of tinnitus in one or both ears is that the ear is rarely the tinnitus source (3). Tinnitus arises not in the ear but in the brain. Imaging studies have conclusively demonstrated an auditory cortical activation (4). In the case of lateralized tinn ...
... binaurally. What is astonishing about the perception of tinnitus in one or both ears is that the ear is rarely the tinnitus source (3). Tinnitus arises not in the ear but in the brain. Imaging studies have conclusively demonstrated an auditory cortical activation (4). In the case of lateralized tinn ...
Morphological and Functional Ear Development
... Aural absorbance is a dimensionless acoustic transfer function that assesses how efficiently the middle ear, and the ear canal to the extent that any wall loss is present, absorbs power (Feeney and Keefe 2010). It has particular relevance for hearing experiments and clinical measurements performed u ...
... Aural absorbance is a dimensionless acoustic transfer function that assesses how efficiently the middle ear, and the ear canal to the extent that any wall loss is present, absorbs power (Feeney and Keefe 2010). It has particular relevance for hearing experiments and clinical measurements performed u ...
sample test
... c. intensity. d. speed. The changing pitch of a police car’s siren as it moves by you is an example of a. the Doppler effect. b. resonance. c. the speed of sound. d. intensity. As a sound source moves toward a listener, the pitch a. appears to decrease. b. appears to increase. c. stays the same. d. ...
... c. intensity. d. speed. The changing pitch of a police car’s siren as it moves by you is an example of a. the Doppler effect. b. resonance. c. the speed of sound. d. intensity. As a sound source moves toward a listener, the pitch a. appears to decrease. b. appears to increase. c. stays the same. d. ...
Auditory fMRI correlates of loudness perception for
... The psychoacoustic feature of loudness plays an important role for auditory perception. The loudness of a sound is largely determined by the stimulus intensity, typically expressed as a sound pressure level. However, the relationship between intensity and loudness is also affected by the bandwidth o ...
... The psychoacoustic feature of loudness plays an important role for auditory perception. The loudness of a sound is largely determined by the stimulus intensity, typically expressed as a sound pressure level. However, the relationship between intensity and loudness is also affected by the bandwidth o ...
Co-Relation between Pure Tone Threshold and Acoustic Reflex
... instructed to respond even to the faintest stimulus presented through the headphone by raising their finger when the sound is heard. Modified Hughson and Westlake procedure was followed in this test. Hearing threshold was tested at frequencies 250Hz, 500Hz, 1 KHz, 2 KHz, 4 KHz and 8KHz. Pure tone av ...
... instructed to respond even to the faintest stimulus presented through the headphone by raising their finger when the sound is heard. Modified Hughson and Westlake procedure was followed in this test. Hearing threshold was tested at frequencies 250Hz, 500Hz, 1 KHz, 2 KHz, 4 KHz and 8KHz. Pure tone av ...