Jetzt auswählen und bestellen
85,85 €
exkl. USt.
In den Warenkorb
Norm

ISO 4869-1:2018

Ausgabedatum: 2018 10 04

Acoustics — Hearing protectors — Part 1: Subjective method for the measurement of sound attenuation

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 ...
Gültig
Herausgeber:
International Organization for Standardization
Format:
Digital | 18 Seiten
Sprache:
Englisch

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.

ISO 4869-1:2018
2018 10 04
Acoustics — Hearing protectors — Part 1: Subjective method for the measurement of sound attenuation
Norm
ISO 4869-1:1990
1990 12 20
Acoustics — Hearing protectors — Part 1: Subjective method for the measurement of sound attenuation
Norm
ISO 4869:1981
1981 12 01
Acoustics — Measurement of sound attenuation of hearing protectors — Subjective method
Norm