UNCERTAINTY FOR NOISE ATTENUATION MEASUREMENTS OF HEARING PROTECTORS BY REAT METHOD

F. R. Lima, S. N. Y. Gerges, T. R. L. Zmijevski, D. F. Bender

Abstract

The objective of this paper is to present a model for the calculation of measurement uncertainty for noise attenuation measurements of hearing protector by REAT method. The uncertainty calculation was based on the document: "Guide to expression of uncertainty in measurement" by the International Organization for Standardization, first edition, corrected and reprinted in 1995, Geneva, Switzerland. The uncertainty of each source of error was estimated. The overall uncertainty of the noise attenuation measurement of hearing protectors was calculated for each 1/1 octave band frequency test and the results applied in the single number (NRRSF - Noise Reduction Rating for subject fit) uncertainty calculation.

Keywords

hearing protectors, noise attenuation

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PWC-2006-TC8-024u.pdf

DOI

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IMEKO TC

TC8 - Traceability in Metrology

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