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NBN
NBN EN 24869-1 : 1995

NBN EN 24869-1 : 1995

Current

Current

The latest, up-to-date edition.

ACOUSTICS - HEARING PROTECTORS - PART 1: SUBJECTIVE METHOD FOR THE MEASUREMENT OF SOUND ATTENUATION

Published date

01-12-2013

Publisher

Belgian Standards

Committees responsible
National foreword
Method
1. Scope
2. Normative references
3. Definitions
4. Measurement of the sound attenuation of hearing
     protectors
Annexes
A. Uncertainty of sound attenuation measurements
B. Bibliography
Tables
1. Allowable field variation for different microphones
2. Maximum permissible background sound pressure level
3. Minimum and maximum sound pressure levels for test
     signals
A.1 Repeatability and reproducibility of sound
     attenuation measurements on ear-muffs at a
     probability level of 95% (according to ISO 5725)
A.2 Repeatability and reproducibility of sound
     attenuation measurements on ear-plugs at a
     probability level of 95% (according to ISO 5725)

Describes a method for measuring sound attenuation of hearing protectors at the threshold of hearing, to yield values close to the maximum attenuation which are not normally attained under field conditions. This has been adopted because the attenuation values can then be consistently reproduced. This method provides data which are collected at low sound pressure levels but which are also representative of attenuation values at higher levels. An exception is amplitude-sensitive hearing protectors for sound pressure levels above the point at which their level-dependent characteristics become effective. At this level the method specified is inapplicable.

DocumentType
Standard
PublisherName
Belgian Standards
Status
Current

Standards Relationship
I.S. EN 24869-1:1993 Identical
EN 24869-1 : 1992 Identical
UNE-EN 24869-1:1994 Identical
BS EN 24869-1:1993 Identical
UNI EN 24869-1 : 1993 Identical
IEC 60651:1979+AMD1:1993+AMD2:2000 CSV Identical
IEC 60804:2000 Identical

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