RO
SR EN ISO 4869-1:2019
Acoustics - Hearing protectors - Part 1: Subjective method for the measurement of sound attenuation (ISO 4869-1:2018)
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/TS 4869-5 can 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
Status :
Valid
Approval date : 4/25/2019
Number of pages : 24
ICS : 13.340.20 Head protective equipment
Technical Committee : 274 - Human protection against noise and mechanical vibration
- Replaces SR EN 24869-1:1998
- Normative reference SR EN ISO 8253-2:2010
- Normative reference SR EN IEC 60263:2020
- Normative reference SR EN 61260-1:2014