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Repeatability and reproducibility in hearing protector testing.

Authors
Franks-JR; Murphy-WJ; Simon-SD
Source
J Acoust Soc Am 1996 Apr; 99(4):2464
NIOSHTIC No.
20045252
Abstract
Earlier research [Royster et al., J. Acoust. Soc. Am. 99, 1506-1526 (1996)] has reported on a new laboratory test method to predict the amount of attenuation hearing protectors provide to workers in the real world. The subject fit method (SF) employs the use of subjects who are audiometrically competent but naive with respect to hearing protector use and who must rely only upon the manufacturer's instructions to fit a protector for testing. One unresolved issue has been the number of subjects and number of repeated tests per subject necessary to achieve the desired levels of repeatability (test-retest within a laboratory) and reproducibility (test-retest between laboratories). Attenuation data from four laboratories collected with the same protocol showed that estimates of variance for the reproducibility across hearing protectors (Bilsom Muff, E-A-R plug, EP100 plug, V-51R plug) for informed user fit (IUF) were greater than estimates of the SF variance. The estimates of variance for the repeatability across protectors and frequency were comparable between the IUF and SF conditions. The average IUF attenuations across protectors and frequency were greater than the average SF attenuations for all of the plugs.
Keywords
Acoustical-measurements; Mathematical-models; Acoustic-vibration; Acoustic-signals; Biophysics; Noise-frequencies
Contact
John R. Franks, Bioacoust. and Occup. Vib. Sect., Natl. Inst. for Occup. Safety and Health, MS C-27, 4676 Columbia Pkwy., Cincinnati, OH 45226-1998
CODEN
JASMAN
Publication Date
19960401
Document Type
Abstract
Fiscal Year
1996
NTIS Accession No.
NTIS Price
Issue of Publication
4
ISSN
0001-4966
NIOSH Division
DBBS
Source Name
Journal of the Acoustical Society of America
State
OH
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