2004
DOI: 10.1121/1.4780174
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A new hearing protector rating: The Noise Reduction Statistic for use with A weighting (NRSA).

Abstract: An obvious and important question to ask in regard to hearing protection devices (HPDs) is how much hearing protection, commonly called attenuation or noise reduction, can they provide. With respect to the law, at least, this question was answered in 1979 when the U. S. Environmental Protection Agency (EPA) promulgated a labeling regulation for hearing protection devices (HPDs) that specified a descriptor called the Noise Reduction Rating (NRR) measured in decibels (dB). In the intervening 25 years many questi… Show more

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Cited by 3 publications
(6 citation statements)
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“…Data from the NIOSH/ EPA interlaboratory study were used to develop the Noise Reduction Statistic for use with A-weighted noise measurements (NRS A ) which could be directly subtracted from a worker's exposure level without the adjustment required when using the NRR. 114 The NRS A was incorporated into a new ANSI standard. 115 The second issue raised at the 2003 NIOSH/EPA workshop was the need for appropriate methods for labeling performance of nonlinear (level-dependent) HPDs.…”
Section: More Work On Hearing Protector Labelingmentioning
confidence: 99%
“…Data from the NIOSH/ EPA interlaboratory study were used to develop the Noise Reduction Statistic for use with A-weighted noise measurements (NRS A ) which could be directly subtracted from a worker's exposure level without the adjustment required when using the NRR. 114 The NRS A was incorporated into a new ANSI standard. 115 The second issue raised at the 2003 NIOSH/EPA workshop was the need for appropriate methods for labeling performance of nonlinear (level-dependent) HPDs.…”
Section: More Work On Hearing Protector Labelingmentioning
confidence: 99%
“…9 The variability in predicting an individual's attenuation from group laboratory data can err by up to 20 dB. 9 Thus, in determining the effective noise reduction of an individual wearer of a hearing protector at the workplace, OSHA lowers the NRR by 50% for all types of hearing protectors. 10 However, this also ignores the fact that some workers achieve attenuation consistent with or above the NRR, which could potentially lead to over protection.…”
mentioning
confidence: 99%
“…Noise Reduction Rating is a measure of the effectiveness of a hearing protection device (HPD) to reduce noise levels. 9 The higher the NRR the greater the noise reduction. Noise Reduction Ratings are simply population estimates that are derived by testing a small sample of 10 subjects in an acoustic laboratory, and the mean results of the sample determines the NRR of the hearing protector.…”
mentioning
confidence: 99%
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