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UNI EN 24869-1 : 1993

UNI EN 24869-1 : 1993

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

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withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

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

Withdrawn date

16-01-2019

Published date

01-01-1993

Publisher

Ente Nazionale Italiano di Unificazione (UNI)

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.

DevelopmentNote
Supersedes UNI 9037. (06/2004)
DocumentType
Standard
PublisherName
Ente Nazionale Italiano di Unificazione (UNI)
Status
Withdrawn
SupersededBy
Supersedes

Standards Relationship
UNE-EN 24869-1:1994 Identical
EN 24869-1 : 1992 Identical
NBN EN 24869-1 : 1995 Identical
BS EN 24869-1:1993 Identical
I.S. EN 24869-1:1993 Identical
NF EN 24869-1 : 1993 Identical

UNI TR 11326 : 2009 Acoustics - Evaluation of the uncertainty of measurements and calculations in acoustics - Parte 1: General concepts
UNI 9432 : 2011 Acoustics - Determination ooccupational noise exposure

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