A proposal for a more refined single number rating system for hearing protector attenuation specification

Noise and Health

关键词: Effective hearing protector attenuation;    hearing protectors;    rating systems;   

DOI  :  10.4103/1463-1741.99897

来源: DOAJ

【 摘 要 】

From a study of recent hearing protector attenuation test data, this work presents a proposal to reconsider how data, gathered by recognized standard subjective test procedures, is used to calculate the single number performance rating of hearing protectors. Current practice is to embed the expected performance (mean) and the variation in performance (standard deviation) in a single rating figure. A proposal is made for clearly separating expected performance from the variation while retaining the use of the current subjective test procedures. This proposal is applicable to all current single number rating systems including SNR, NRR, SLC 80, and the newer ANSI NRS Ax.

【 授权许可】

Unknown