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CISDOC database

Document ID (ISN)36081
CIS number 81-1261
Year 1980
Convention or series no. DHEW (NIOSH) Publication No.79-115
Author(s) Edwards R.G., Hauser W.P., Moiseev N.A., Broderson A.B., Green W.W., Lempert B.L.
Title Field investigation of noise reduction afforded by insert-type hearing protectors.
Bibliographic information National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Cincinnati, Ohio 45226, USA, Nov. 1978. 43p. Illus. 10 ref.
Abstract The results of 840 noise attenuation measurements (test frequency range: 125-8000Hz) on 168 workers in 6 plants indicated that workers were receiving noise protection, from 3 earplug designs, in the range 6dB at 125Hz to 20dB at 3150Hz. Based on laboratory and manufacturers data, the workers tested were receiving 35 to 50% of the potential attenuation of the hearing protectors in use, in terms of noise reduction in dBA. This reduced performance was due to the use of the wrong size of earplug or improper insertion. The degree of protection did not depend on workplace noise level, earplug design, or company policy regarding earplug usage. A difference was found between attenuation received in the first test and in 4 subsequent tests of each worker. Some difference was noticed between workers on active and passive job tasks.
Descriptors (primary) hearing protection; earplugs; sound attenuation
Descriptors (secondary) USA; report; audiometric tests; field tests; evaluation of control measures
Document type E - Books, reports, proceedings
Subject(s) Noise, hearing and vibration
Broad subject area(s)
Browse category(ies) Noise
Hearing protection