Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement of sound attenuation of hearing protectors
5 Calculation of the assumed protection value, APV[fx], of
  a hearing protector for a selected protection performance
6 Octave-band method
7 HML method
8 SNR method
Annex A (informative) - Example of the calculation of the
        assumed protection values, APV[fx]
Annex B (informative) - Example of the calculation of L'[p,Ax] according
        to the octave-band method
Annex C (informative) - Example of the calculation and use of
        H, M and L values
Annex D (informative) - Example of the calculation and use of SNR values
Annex E (informative) - Uncertainty of calculations
Bibliography

Abstract

Defines three methods (the octave-band, HML and SNR methods) of estimating the A-weighted sound pressure levels effective when hearing protectors are worn.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Organization for Standardization
Pages
ISBN
Committee	TC 43