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Year : 2011  |  Volume : 13  |  Issue : 51  |  Page : 132--141

Effects of training on hearing protector attenuation

William J Murphy1, Mark R Stephenson1, David C Byrne1, Brad Witt2, Jesse Duran2 
1 National Institute for Occupational Safety and Health, Division of Applied Research and Technology, Engineering and Physical Hazards Branch, Hearing Loss Prevention Team, Cincinnati, OH 45226-1998, USA
2 Howard Leight Acoustical Test Laboratory, Sperian Hearing Protection, LLC 7828 Waterville Road, San Diego, CA 92154, USA

Correspondence Address:
William J Murphy
Captain, U.S. Public Health Service, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, MS C-27, Cincinnati OH 45226-1998

The effect of training instruction, whether presented as the manufacturer«SQ»s printed instructions, a short video training session specific to the product, or as a one-on-one training session was evaluated using four hearing protection devices with eight groups of subjects. Naïve subjects were recruited and tested using three different forms of training: written, video, and individual training. The group averages for A-weighted attenuation were not statistically significant when compared between the video or the written instruction conditions, regardless of presentation order. The experimenter-trained A-weighted attenuations were significantly greater than the written and video instruction for most of the protectors and groups. For each earplug, the noise reduction statistic for A-weighting (NRS A ) and the associated confidence intervals were calculated for the 80 th and 20 th percentiles of protection. Across subject groups for each protector, the differences between NRS A ratings were found to be not statistically significant. Several comparisons evaluating the order of testing, the type of testing, and statistical tests of the performance across the groups are presented.

How to cite this article:
Murphy WJ, Stephenson MR, Byrne DC, Witt B, Duran J. Effects of training on hearing protector attenuation.Noise Health 2011;13:132-141

How to cite this URL:
Murphy WJ, Stephenson MR, Byrne DC, Witt B, Duran J. Effects of training on hearing protector attenuation. Noise Health [serial online] 2011 [cited 2022 Aug 16 ];13:132-141
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