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EVS-EN ISO 4869-3:2008

Acoustics - Hearing protectors - Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture

General information

Valid from 07.03.2008
Base Documents
ISO 4869-3:2007; EN ISO 4869-3:2007
Directives or regulations
None

Standard history

Status
Date
Type
Name
This part of ISO 4869 specifies a method for measuring the insertion loss of ear-muff type hearing protectors using an acoustic test fixture. The method is applicable to the investigation of production spreads of performance as part of type approval or certification procedures, and to the investigation of the change of performance with age. It is intended to ensure that ear-muff hearing protector samples submitted for subjective testing of attenuation according to ISO 4869-1 have performances typical of the type.

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