Health Effects of Exposure to Ultrasound and Infrasound
... addition, ultrasonically powered tools are used in dentistry and surgery. The safety implications for therapeutic and surgical applications, in which the aim is to deliver high intensity ultrasound to a target tissue and achieve beneficial modification of that tissue, are clearly very different from ...
... addition, ultrasonically powered tools are used in dentistry and surgery. The safety implications for therapeutic and surgical applications, in which the aim is to deliver high intensity ultrasound to a target tissue and achieve beneficial modification of that tissue, are clearly very different from ...
Intensity Discrimination and Binaural Interaction
... sound image is shifted from the median plane. This effect is also known as lateralization. However, if the same signal is presented to both ears (diotic stimulus), the sound appears to come from the center of the head. If the level of the signal at one ear is rised, the sound image shifts towards th ...
... sound image is shifted from the median plane. This effect is also known as lateralization. However, if the same signal is presented to both ears (diotic stimulus), the sound appears to come from the center of the head. If the level of the signal at one ear is rised, the sound image shifts towards th ...
auditory distortions: origins and functions
... FIGURE 1. A: schematic cross-section of a mammalian cochlea, showing the three fluid-filled compartments scala vestibuli (SV), scala media (SM) and scala tympani (ST), the basilar membrane (BM), and Reissner’s membrane (RM). The organ of Corti contains one row of inner hair cells (IHCs, black arrow) ...
... FIGURE 1. A: schematic cross-section of a mammalian cochlea, showing the three fluid-filled compartments scala vestibuli (SV), scala media (SM) and scala tympani (ST), the basilar membrane (BM), and Reissner’s membrane (RM). The organ of Corti contains one row of inner hair cells (IHCs, black arrow) ...
Research paper : Assessing the Impact of Underwater
... ear tissues), depending on which components of the auditory system are affected and how they are affected. More severe trauma was expected to occur at higher levels than those required to cause permanent hearing loss and, as such, this was considered as a lower limit. Permanent and Temporary Thresho ...
... ear tissues), depending on which components of the auditory system are affected and how they are affected. More severe trauma was expected to occur at higher levels than those required to cause permanent hearing loss and, as such, this was considered as a lower limit. Permanent and Temporary Thresho ...
Blast Noise of the L119 Light Gun
... hearing protector performance for impulse noise was developed, using manufacturer supplied octave band attenuation data. This report has focussed specifically on blast noise from heavy calibre weapons, but the methodologies and techniques could be applied to small arms. The report considers only the ...
... hearing protector performance for impulse noise was developed, using manufacturer supplied octave band attenuation data. This report has focussed specifically on blast noise from heavy calibre weapons, but the methodologies and techniques could be applied to small arms. The report considers only the ...
the human ear: reading and questions
... auditory canal). The pinna acts as a funnel for sound waves and allows us to pinpoint the direction from which a sound originated (both horizontal and vertical direction). Some animals, like coyotes, dogs and cats, are able to move their pinna toward a source of sound, but muscles used to control th ...
... auditory canal). The pinna acts as a funnel for sound waves and allows us to pinpoint the direction from which a sound originated (both horizontal and vertical direction). Some animals, like coyotes, dogs and cats, are able to move their pinna toward a source of sound, but muscles used to control th ...
REVIEW PAPER The effects of anthropogenic sources of sound on
... stimuli. Moreover, one must also be cautious with any attempt to extrapolate results between stimuli because the characteristics of the sources (e.g. air guns, sonars, ships, pile driving) differ significantly from one another. For the purpose of this review, exposure to sound is defined to include ...
... stimuli. Moreover, one must also be cautious with any attempt to extrapolate results between stimuli because the characteristics of the sources (e.g. air guns, sonars, ships, pile driving) differ significantly from one another. For the purpose of this review, exposure to sound is defined to include ...
Effects of underwater noise on auditory sensitivity of a cyprinid ¢sh
... cell damage, caused by acoustic trauma, might take a certain amount of time to fully manifest and that 4 days post-treatment, used in their experiment, may not have been long enough to wait before observing complete damage. From the aforementioned studies, it is obvious that our understanding of how ...
... cell damage, caused by acoustic trauma, might take a certain amount of time to fully manifest and that 4 days post-treatment, used in their experiment, may not have been long enough to wait before observing complete damage. From the aforementioned studies, it is obvious that our understanding of how ...
STRUCTURE, FUNCTION, AND ADAPTATION OF THE MANATEE
... The ossicular chain is massive, nearly straight, and loose ly joined (Fig. 5). The stapes and incus lie on a medial-lateral line posterior to the malleus, so that the two major axes of rotation of the ossicles, based on center of mass, form an angle of approximately 140°. The stapes is the most rema ...
... The ossicular chain is massive, nearly straight, and loose ly joined (Fig. 5). The stapes and incus lie on a medial-lateral line posterior to the malleus, so that the two major axes of rotation of the ossicles, based on center of mass, form an angle of approximately 140°. The stapes is the most rema ...
Amplifying soft sounds - a personal matter
... on the level of the hearing loss and the position of the Soft Sound Perception control. For a moderate hearing-loss, the knee-point is close to a 45-dB SPL input level and moves towards lower levels for more severe hearing loss, without going under 26 dB SPL. This position is then further adjusted d ...
... on the level of the hearing loss and the position of the Soft Sound Perception control. For a moderate hearing-loss, the knee-point is close to a 45-dB SPL input level and moves towards lower levels for more severe hearing loss, without going under 26 dB SPL. This position is then further adjusted d ...
MIOSHA-STD-1210 (12/15) For further information 18 Pages Ph: 517-284-7740
... expressed in units of dBA. (m) “Sound level meter” means an instrument for the measurement of sound level. (n) “Standard threshold shift” means a change in the hearing threshold relative to the baseline audiogram of an average of 10 dB or more at 2000, 3000, and 4000 Hz in either ear. (o) “Time-weig ...
... expressed in units of dBA. (m) “Sound level meter” means an instrument for the measurement of sound level. (n) “Standard threshold shift” means a change in the hearing threshold relative to the baseline audiogram of an average of 10 dB or more at 2000, 3000, and 4000 Hz in either ear. (o) “Time-weig ...
Hearing in the Juvenile Green Sea Turtle (Chelonia mydas): A
... and recorded AEP responses from the electrodes at a sampling rate of 24412 Hz. We amplified signals from the electrodes using a digital biological amplifier (Tucker-Davis Technologies, Inc.) and filtered the signals to remove sound outside the frequencies of interest (high pass: 50 Hz; low pass: 5 k ...
... and recorded AEP responses from the electrodes at a sampling rate of 24412 Hz. We amplified signals from the electrodes using a digital biological amplifier (Tucker-Davis Technologies, Inc.) and filtered the signals to remove sound outside the frequencies of interest (high pass: 50 Hz; low pass: 5 k ...
Theory and practice of pure tone audiometry - Vula
... are sharp drops i.e. >20 dB) in the audiogram at the octave frequencies 1 Step 10: Repeat all the above steps on the poorer hearing ear. Determine for every frequency whether it is necessary to mask. When, why and how to mask is discussed later. In general, if the air conduction threshold of the tes ...
... are sharp drops i.e. >20 dB) in the audiogram at the octave frequencies 1 Step 10: Repeat all the above steps on the poorer hearing ear. Determine for every frequency whether it is necessary to mask. When, why and how to mask is discussed later. In general, if the air conduction threshold of the tes ...
Operating Instructions MA 40
... Air conduction testing is used to measure the patient’s hearing threshold levels. The test is usually started on the ear with better hearing. 1. Turn the MA 40 on and let it warm up for 10 minutes before using. Upon power up the initial setting will be in audiometric testing mode, left ear on air co ...
... Air conduction testing is used to measure the patient’s hearing threshold levels. The test is usually started on the ear with better hearing. 1. Turn the MA 40 on and let it warm up for 10 minutes before using. Upon power up the initial setting will be in audiometric testing mode, left ear on air co ...
Responses of the Inner Ear to Infrasound
... Castelo Branco, 2007). It is important to realize that the concept was not based on physiologic scientific studies in which “harm” was quantified or measured in some way that correlated with low-frequency sound measurements. Rather, the statement was a speculation without any fundamental considerati ...
... Castelo Branco, 2007). It is important to realize that the concept was not based on physiologic scientific studies in which “harm” was quantified or measured in some way that correlated with low-frequency sound measurements. Rather, the statement was a speculation without any fundamental considerati ...
Aalborg Universitet Some observations on sensitivity to HRTF magnitude
... a frequency-independent delay to control the interaural time difference (ITD) and minimum-phase filters to control the magnitude spectra [11]. 1 METHOD 1.1 Subjects Four paid subjects participated in the listening experiment, one female and three males. Their ages ranged from 23 to 28 years. Subject ...
... a frequency-independent delay to control the interaural time difference (ITD) and minimum-phase filters to control the magnitude spectra [11]. 1 METHOD 1.1 Subjects Four paid subjects participated in the listening experiment, one female and three males. Their ages ranged from 23 to 28 years. Subject ...
Spatial Tuning to Virtual Sounds in the Inferior Colliculus of the
... sounds. Thus these virtual acoustic space signals contain all information necessary for localization: interaural information [interaural level difference (ILD) and interaural time difference (ITD)] as well as monaural spectral cues. Because the external ear can be described as a linear timeinvariant ...
... sounds. Thus these virtual acoustic space signals contain all information necessary for localization: interaural information [interaural level difference (ILD) and interaural time difference (ITD)] as well as monaural spectral cues. Because the external ear can be described as a linear timeinvariant ...
View PDF - e-Science Central
... perilymph and the vibrations of the basilar membrane. With regard to the analyzed transformation of signals, the scala vestibuli, scale tympani, basilar membrane and organ of Corti are of the highest importance, the latter of which transforms deformations of the basilar membrane into tension pulses ...
... perilymph and the vibrations of the basilar membrane. With regard to the analyzed transformation of signals, the scala vestibuli, scale tympani, basilar membrane and organ of Corti are of the highest importance, the latter of which transforms deformations of the basilar membrane into tension pulses ...
Otoacoustic emissions, their origin in cochlear function, and use
... most of the stimulus energy before any clear separate excitation peaks for f1 and f2 can develop. This corresponds to the ‘dead’ cochlea as studied by von Békésy. Sharp ‘images’ of stimuli f1 and f2 can be seen in (B), where damping has been largely removed by linear OHC amplification. In reality, O ...
... most of the stimulus energy before any clear separate excitation peaks for f1 and f2 can develop. This corresponds to the ‘dead’ cochlea as studied by von Békésy. Sharp ‘images’ of stimuli f1 and f2 can be seen in (B), where damping has been largely removed by linear OHC amplification. In reality, O ...
Binaural VoiceStream Technology
... a predefined weighting function. This results in a microphone array consisting of 4 microphones, together forming a microphone system of the third order. The phase and amplitude characteristics of the microphones must be closely matched for this purpose. The microphones are already matched before t ...
... a predefined weighting function. This results in a microphone array consisting of 4 microphones, together forming a microphone system of the third order. The phase and amplitude characteristics of the microphones must be closely matched for this purpose. The microphones are already matched before t ...
The outer, middle, and inner structures of the ear collect
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Noise Glossary of Terms
... A numerically calculated measurement of the intelligibility of transmitted or processed speech. It takes into account the limitations of the transmission path and the background noise at the point of interest. The index can range between 0 and 1.0. if it is less than about 0.1 speech intelligibility ...
... A numerically calculated measurement of the intelligibility of transmitted or processed speech. It takes into account the limitations of the transmission path and the background noise at the point of interest. The index can range between 0 and 1.0. if it is less than about 0.1 speech intelligibility ...
Extracting the frequencies of the pinna spectral notches Vikas C. Raykar
... The head related impulse response 共HRIR兲 characterizes the auditory cues created by scattering of sound off a person’s anatomy. The experimentally measured HRIR depends on several factors such as reflections from body parts 共torso, shoulder, and knees兲, head diffraction, and reflection/ diffraction ...
... The head related impulse response 共HRIR兲 characterizes the auditory cues created by scattering of sound off a person’s anatomy. The experimentally measured HRIR depends on several factors such as reflections from body parts 共torso, shoulder, and knees兲, head diffraction, and reflection/ diffraction ...
THE CETACEAN EAR: FORM, FREQUENCY, AND EVOLuTION
... annular stapedial ligament is calcified, but these data are insufficient to determine whether stapes fixation is an important determinant of Type I vs. Type II ears. Mysticete ossicles are equally massive but have none bf the high frequency related specializations of odontocetes. The ossicles are no ...
... annular stapedial ligament is calcified, but these data are insufficient to determine whether stapes fixation is an important determinant of Type I vs. Type II ears. Mysticete ossicles are equally massive but have none bf the high frequency related specializations of odontocetes. The ossicles are no ...
Audio quality in networked systems
... An audio system’s limitation poses physical limits to level, frequency and time. For example, the high-end limitation in an audio system’s level range is any incapability to reach 120dBSPL at a listeners position, while an audio system’s low-end level limitation often presents itself as a constant l ...
... An audio system’s limitation poses physical limits to level, frequency and time. For example, the high-end limitation in an audio system’s level range is any incapability to reach 120dBSPL at a listeners position, while an audio system’s low-end level limitation often presents itself as a constant l ...