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BSI BS ISO 4869-6:2019

Acoustics. Hearing protectors -- Determination of sound attenuation of active noise reduction earmuffs
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BSI BS ISO 4869-6:2019

Acoustics. Hearing protectors -- Determination of sound attenuation of active noise reduction earmuffs

PUBLISH DATE 2019
PAGES 20
BSI BS ISO 4869-6:2019

This document is concerned with active noise reduction (ANR) earmuffs. It specifies the test methods for the determination of the active insertion loss and calculation procedures for deriving the total attenuation. For this aim, the values of sound attenuation in the passive mode also have to be known and are determined according to ISO 4869‑1. These methods are intended for steady noise exposures and are not applicable to noises containing impulsive components.

The test methods account for the acoustical interaction between the wearer and the device using measurements of passive (REAT) and active microphone-in-real-ear (MIRE) measurements as specified in ISO 4869‑1 and ISO 11904‑1, respectively.

SDO BSI: British Standards Institution
Document Number ISO 4869-6
Publication Date Feb. 5, 2019
Language en - English
Page Count
Revision Level
Supercedes
Committee EH/1/1
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