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Effect of Industrial Work-Related Variables on Achieved Hearing Protector Attenuation.
Auditory Systems Laboratory, Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 1990 Nov:71 pages
Studies were conducted to determine spectral noise attenuation and perceived comfort in controlled laboratory and industrial field settings. The laboratory simulations were developed to investigate the effects of several field factors of hearing protective device (HPD) wearing time, activity movement, and HPD fitting conditions on spectral attenuation and comfort afforded by foam and triple flanged earplugs, a foam cushion earmuff, and an earmuff over foam earplug combination. The findings indicated that achieved attenuation and user comfort significantly decreased over the two hour HPD wearing period and that training for better fitting markedly improved the noise protection. In the field study the actual noise attenuation and comfort were determined over two consecutive 3 week periods of HPD use in five industrial workplaces. The overall field attenuation results indicated that in general the laboratory protocols cannot be relied upon to yield valid predictions of true workplace protection levels afforded by hearing protectors. The exception was the earmuff for which laboratory test results were not significantly different from those of the field at any frequency when like fitting protocols were compared.
NIOSH-Grant; Noise-induced-hearing-loss; Workplace-studies; Personal-protective-equipment; Hearing-impairment; Noise-protection;
Indus Engr and Operations Res Virginia Polytechnic Institute Blacksburg, VA Blacksburg, VA 24061
Final Grant Report;
NTIS Accession No.
Hearing Loss; Disease and Injury; Noise-induced-hearing-loss; Control Technology and Personal Protective Equipment; Research Tools and Approaches;
Auditory Systems Laboratory, Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
Virginia Polytechnic Inst and St Univ, Blacksburg, Virginia
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division