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High fidelity hearing protection devices: Attenuation in human ears and manikin devices
The Journal of the Acoustical Society of America, 2020Flatness of attenuation was measured for high-fidelity hearing protection devices (HPDs) using microphone-in-real-ear (MIRE) and behavioral real-ear-attenuation-at-threshold (REAT) protocols. In addition, participants completed the words-in-noise (WIN) test with and without HPDs, and provided subjective ratings of perceived sound quality via surveys ...
Colleen Le Prell, Tess Zaccardi
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Transfer function of open ear importance in assessment of hearing protection devices noise reduction
Russian Journal of Occupational Health and Industrial Ecology, 2021Introduction. Objective assessment of the noise redaction (NR) of individual hearing protection devices (HDP) in industrial conditions is actual problem despite numerous studies in this direction in many countries. This study aimed to implement the F-MIRE method for measuring the NR of HDPs, considering the transfer function of the outer ear. Materials
Ludmila V. Prokopenko +3 more
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Evaluation of Ear Protective Devices
The Journal of the Acoustical Society of America, 1956Ear protective devices have been evaluated according to the procedures recently proposed by the American Standards Association (pure tone, binaural, free field, threshold shift method). To obtain an estimate of subject variability, attenuation values for the V-51R ear plug were determined for twenty subjects, with five replications for each subject ...
David T. Blackstock, Ronald G. Hansen
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The Journal of the Acoustical Society of America, 2022
Hearing protection devices (HPDs) are designed to reduce the amplitude of sound reaching the ear, but can also distort the acoustical cues necessary for sound localization. In order to quantify the acoustic impact of an HPD on the signal reaching the tympanic membrane, the signals deep in the ear canal with and without the HPD must be compared.
David A. Anderson +4 more
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Hearing protection devices (HPDs) are designed to reduce the amplitude of sound reaching the ear, but can also distort the acoustical cues necessary for sound localization. In order to quantify the acoustic impact of an HPD on the signal reaching the tympanic membrane, the signals deep in the ear canal with and without the HPD must be compared.
David A. Anderson +4 more
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Measuring the External Ear for Hearing Protection Device Design
Ergonomics in Design: The Quarterly of Human Factors Applications, 2018In this study we aimed to obtain anthropometric measurements of external ear dimensions for designing hearing protection devices (HPDs). We measured 3 dimensions of left and right ears of 153 operational workers and compared the measured data with earplugs (Eps) and earmuffs (Ems).
Mohammad Amin Mououdi +2 more
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Language, Speech, and Hearing Services in Schools, 2021
PurposeSensitivity to sounds and atypical reactions to sensory input by individuals with autism spectrum disorder (ASD) have been reported in the literature. In response to this sensitivity, some individuals use ear protection devices (EPDs) such as noise-canceling headphones, earplugs, or earmuffs to attenuate the perceived unpleasant sounds.
Dorothy Neave-DiToro +2 more
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PurposeSensitivity to sounds and atypical reactions to sensory input by individuals with autism spectrum disorder (ASD) have been reported in the literature. In response to this sensitivity, some individuals use ear protection devices (EPDs) such as noise-canceling headphones, earplugs, or earmuffs to attenuate the perceived unpleasant sounds.
Dorothy Neave-DiToro +2 more
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Noise Attenuation of Current Ear-Protective Devices
The Journal of the Acoustical Society of America, 1962Ten ear-protective devices—three plugs, three muffs, two phone-in-muff combinations, one phone-in-muff in protective helmet, and one plug-muff combination—were tested for noise attenuation. The psychophysical method of binaural threshold shift (occluded ears minus open ear) for half-octave bands of noise using three trials on five experienced listeners
J. C. Webster, E. R. Rubin
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The Journal of the Acoustical Society of America, 1985
An 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 permeable to water vapor.
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An 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 permeable to water vapor.
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Evaluation of digital ear scanning for custom hearing protection devices
The Journal of the Acoustical Society of America, 2019Custom earpieces (e.g., hearing aids, insert hearing protection devices) are traditionally made using physical earmold impressions. Advances in technologies have led to the development of digital methods to capture ear canal geometries for the production of custom earpieces.
J. R. W. Stefanson, William A. Ahroon
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Protective ear covering device
The Journal of the Acoustical Society of America, 1998A single piece protective ear covering device is provided. The device is designed to protect the ear from heat and hairdressing preparations while the hair of the user is being treated. The device has a pair of mutually opposed ear coverings having a drawstring threaded therethrough and through a central strap for adjusting the ear coverings to a ...
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