BS EN ISO 4869-1:2018

BS EN ISO 4869-1:2018

Acoustics. Hearing protectors. Subjective method for the measurement of sound attenuation

Status : Current   Published : November 2018



What is this standard about?

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

Standard NumberBS EN ISO 4869-1:2018
TitleAcoustics. Hearing protectors. Subjective method for the measurement of sound attenuation
Publication Date28 November 2018
Normative References(Required to achieve compliance to this standard)IEC 60263, IEC 61260-1, ISO 8253-2
Informative References(Provided for Information)EN 13819-1, ISO 389-1, ISO 354, ANSI S3.20-2015, ANSI S12.6-2016, ISO 7240-24, ISO/TS 4869-5, ISO 8253-1, GUM:1995, ISO/IEC Guide 98-3
ReplacesBS EN 24869-1:1993, ISO 4869-1:1990
International RelationshipsEN ISO 4869-1:2018,ISO 4869-1:2018
Draft Superseded By15/30297373 DC
DescriptorsAudiofrequencies, Auditory threshold, Performance testing, Safety measures, Ear muffs, Audibility, Protective clothing, Audiometry, Acoustic testing, Attenuation, Test equipment, Ear plugs, Ear protectors, Acoustic measurement, Hearing (auditory perception), Sound intensity, Reverberation time
Title in FrenchAcoustique. Protecteurs individuels contre le bruit Méthode subjective de mesurage de l'affaiblissement acoustique
Title in GermanAkustik. Gehörschützer Subjektive Methode zur Messung der Schalldämmung
ISBN978 0 580 85845 1
File Size606 KB

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