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BS EN ISO 4869-1:2018

Current
Current

The latest, up-to-date edition.

Acoustics. Hearing protectors Subjective method for the measurement of sound attenuation
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

28-11-2018

This document specifies a subjective method for measuring sound attenuation of hearing protectors at the threshold of hearing.

This document specifies a subjective method for measuring sound attenuation of hearing protectors at the threshold of hearing. The method is a laboratory method designed to yield reproducible values under controlled measurement conditions. The values reflect the attenuating characteristics of the hearing protector only to the extent that users wear the device in the same manner as did the test subjects.

For a more representative indication of field performance the methods of ISO/TS4869‑5can be used.

This test method yields data which are collected at low sound pressure levels (close to the threshold of hearing) but which are also representative of the attenuation values of hearing protectors at higher sound pressure levels. An exception occurs in the case of amplitude-sensitive hearing protectors for sound pressure levels above the point at which their level-dependent characteristics become effective. At those sound pressure levels the method specified in this document is inapplicable, as it will usually underestimate sound attenuation for these devices.

NOTE Due to masking from physiological noise in the occluded ear tests, sound attenuations below 500Hz can be overestimated by a few decibels.

Committee
EH/1/1
DocumentType
Standard
ISBN
9780580858451
Pages
26
ProductNote
THIS STANDARD ALSO REFERS TO- ANSI S12.6-2016, GUM:1995
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 4869-1:2018 Identical

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