DS/EN ISO 4869-1:2018

Akustik - Høreværn - Del 1: Subjektiv metode til måling af lyddæmpning


Status:
Gældende
Type:
Standard
Sprog:
Engelsk
Pris fra:
kr. 555,00

Beskrivelse

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.


Antal sider: 32

Udgivet: 2018-11-29

Godkendelsesdato: 2018-11-26

Internationale relationer : EN ISO 4869-1:2018 IDT ISO 4869-1:2018 IDT

ICS: 13.340.20 - Hovedbeskyttelsesudstyr

Varenummer: M294371


Udvalg og komiteer

Komite

  • CEN/TC 211
  • ISO/TC 43/SC 1
  • ISO/TC 43/SC 1/WG 17

Dansk udvalg

DS/S-115