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Analyses on the E-A-R Foam Earplug for the Dynamic Work Activity Experiment.

Authors
Casali-JG; Park-Y
Source
Department of Industrial Engineering and Operations Research, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 1990 Jan:32 pages
Link
NIOSHTIC No.
00201857
Abstract
A controlled laboratory experiment was conducted to investigate the effects of different levels of subject fit, wearing time, and subject movement activity, on the frequency specific attenuation achieved with particular slow recovery foam earplugs. A psychophysical real ear attenuation at threshold testing procedure was used to collect attenuation data from ten subjects at nine test frequencies. While prior research suggested that attenuation may decrease over time with aural inserts, these compliant inserts were stable in the face of vigorous temporomandibular and highly kinetic bodily activity, thus exhibiting negligible degradation in attenuation over time. Improvements in attenuation provided by trained subject fit versus naive subject fit of the earplugs were large at 1000 hertz (Hz) and below, ranging from gains of 12 to 14 decibels (dB). The gains were smaller, but still statistically at 2000 to 8000Hz, ranging from 3 to 5dB.
Keywords
NIOSH-Grant; Noise-induced-hearing-loss; Ear-protectors; Personal-protective-equipment; Hearing-impairment; Hearing-protection;
Contact
Indus Engr and Operations Res Virginia Polytechnic Institute Blacksburg, VA Blacksburg, VA 24061
Publication Date
19900101
Document Type
Final Grant Report;
Funding Amount
107502.00
Funding Type
Grant;
Fiscal Year
1990
NTIS Accession No.
PB92-124015
NTIS Price
A04
Identifying No.
Grant-Number-R01-OH-02540
NIOSH Division
OEP
Priority Area
Hearing Loss; Disease and Injury; Noise-induced-hearing-loss; Control Technology and Personal Protective Equipment; Research Tools and Approaches;
Source Name
Department of Industrial Engineering and Operations Research, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
State
VA;
Performing Organization
Virginia Polytechnic Inst and St Univ, Blacksburg, Virginia
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