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Exploring Procedures for Field Testing the Fit of Earplugs.

Authors
Berger-EH
Source
NIOSH 1989 Apr:7-10
Link
NIOSHTIC No.
00212460
Abstract
Real ear attenuation at threshold of five different types of earplugs was determined. Fifteen subjects participated in the study. For each subject, all five earplugs were tested with two conditions of fit. Two measurements were made of each plug/fit combination. Test signals were presented using circumaural earcups with enclosed earphones. A comparison was made of the results for both pure tone and 1/3 octave band (OB) signals to the standardized 1/3OB sound field procedure specified in ANSI S12.6-1984. Pure tone and 1/3OB signals yielded the same measured attenuation values, and the measures at only one or two frequencies could be used to adequately predict overall attenuation. The author concludes that further experimentation is needed as the variability of the individual results was so great. These studies are expected to determine the precision of using a circumaural device to estimate the level of protection being achieved by a given wearer.
Keywords
Industrial-noise; Hearing-protection; Acoustical-measurements; Ear-protection; Acoustic-signals; Personal-protective-equipment; Ear-protectors;
Publication Date
19890401
Document Type
Conference/Symposia Proceedings;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Priority Area
Control Technology and Personal Protective Equipment; Research Tools and Approaches;
Source Name
Proceedings, 1989 Industrial Hearing Conservation Conference, April 12-14, 1989, College of Engineering, University of Kentucky, Lexington, Kentucky, and NIOSH
State
KY;
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