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The Journal of the Acoustical Society of America, 2023
High level sound exposure can cause substantial injury to the auditory system, motivating efforts to predict and prevent this injury. Measurement techniques using acoustic manikins are effective for low and moderate sound levels, but nonlinear effects in the middle ear and alternate sound transmission pathways to the inner ear limit their utility at ...
Nathaniel T. Greene +4 more
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High level sound exposure can cause substantial injury to the auditory system, motivating efforts to predict and prevent this injury. Measurement techniques using acoustic manikins are effective for low and moderate sound levels, but nonlinear effects in the middle ear and alternate sound transmission pathways to the inner ear limit their utility at ...
Nathaniel T. Greene +4 more
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Nonlinear ear protecting device
The Journal of the Acoustical Society of America, 1985An ear protecting device for protecting a wearer from annoying and/or damaging noise levels. The device is comprised of a connecting member and a pair of muffs suitable for covering a wearer's ears. The muffs are suspended from opposite portions of the connecting member. The muffs are each comprised of a cup and an earseal cushion.
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Variability in real-ear attenuation at threshold evaluations of hearing protection devices
The Journal of the Acoustical Society of America, 2006The American National Standard Method for the Measurement of the Real-Ear Attenuation of Hearing Protectors (ANSI S12.6-1997 [R2002]) contains explicit requirements for the physical parameters of the test facility used in measuring the performance of hearing protection devices and in subject selection and device fitting. However, the standard curiously
William A. Ahroon +2 more
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Fit testing of a hearing protection device with integrated in-ear noise exposure monitoring
The Journal of the Acoustical Society of America, 2018In-the-ear hearing protectors are often used in high-noise environments, such as in military operations and during weapons training. The fit of such a hearing protection device in the ear canal can cause significant variability in the noise dose experienced, an important factor in characterizing the auditory health risk.
Christopher J. Smalt +5 more
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A critical analysis of attenuation effects of different types of ear protective devices
Indian Journal of Otolaryngology, 1991The present study was undertaken to evaluate the noise attenuation characteristics of different types of Ear protective Devices which are commonly used. 20 healthy normal subjects’ open and closed hearing thresholds (with the usage of ear protective device) were recorded in an anechoic chamber and the attenuation charactaristics at 8 discrete ...
A. B. Rao, BN Pranesh Rao
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On the Behavior of Ear Protection Devices below 1000 cps
The Journal of the Acoustical Society of America, 1958An extensive set of measurements has been made on various type of ear protection devices, generally consisting of a hard-shelled volume coupled to the head by an annular pad filled with various materials. Attenuation measurements were made with a miniature pressure microphone.
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The Journal of the Acoustical Society of America, 2014
Hearing protection devices are increasingly designed with the capability to protect against impulsive sound. Current methods used to test protection from impulsive noise, such as blasts and gunshots, suffer from various drawbacks and complex, manual experimental procedures.
Theodore F. Argo, G. Douglas Meegan
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Hearing protection devices are increasingly designed with the capability to protect against impulsive sound. Current methods used to test protection from impulsive noise, such as blasts and gunshots, suffer from various drawbacks and complex, manual experimental procedures.
Theodore F. Argo, G. Douglas Meegan
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Calibration of an In-Ear Dosimeter for a Single Hearing Protection Device
2014Abstract : Military personnel working in high noise environments could be exposed to noise levels up to 150 dB. Daily noise exposure limits are based on both ambient noise levels and the duration of time spent in that noise environment. NAVAIR led ATI in the development of a ship-suitable in-ear dosimeter integrated into a single hearing protector, and
Valerie S. Bjorn +3 more
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The Journal of the Acoustical Society of America, 1962
The attenuation of two different earplugs and a helmet was measured by a procedure combining the free-field threshold shift and the Békésy threshold tracking methods. Subjects were then exposed to impulse noise which would produce between 12 and 64 dB TTS at 6000 cps unprotected and their TTS was subsequently measured after identical exposure during ...
J. L. Fletcher, M. Loeb
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The attenuation of two different earplugs and a helmet was measured by a procedure combining the free-field threshold shift and the Békésy threshold tracking methods. Subjects were then exposed to impulse noise which would produce between 12 and 64 dB TTS at 6000 cps unprotected and their TTS was subsequently measured after identical exposure during ...
J. L. Fletcher, M. Loeb
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The Journal of the Acoustical Society of America, 1956
The sound-exclusion properties (acoustic attenuation) of various earphones and ear defenders and combinations thereof were determined by the binaural, free-field, absolute-threshold-shift technique with the psychophysical method of adjustment. The earphones included dynamic earphones in two different sockets and hearing-aid-type receivers with ...
J. C. Webster +2 more
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The sound-exclusion properties (acoustic attenuation) of various earphones and ear defenders and combinations thereof were determined by the binaural, free-field, absolute-threshold-shift technique with the psychophysical method of adjustment. The earphones included dynamic earphones in two different sockets and hearing-aid-type receivers with ...
J. C. Webster +2 more
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