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BSI BS EN ISO 4869-3:2007

Acoustics. Hearing protectors -- Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture
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BSI BS EN ISO 4869-3:2007

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

PUBLISH DATE 2007
PAGES 22
BSI BS EN ISO 4869-3:2007

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.

The method specified in this part of ISO 4869 is not applicable as the basic test for type approval. Performance data obtained by this method are not intended to be quoted as representing the real-ear sound attenuation of an ear-muff, nor the protection provided by the ear-muff.

For the testing of certain ear-muffs (such as those attached to safety helmets, or those with contoured ear-cups or ear-cushions, or supra-aural ear-muffs), the procedure described in this part of ISO 4869 might need to be modified.

SDO BSI: British Standards Institution
Document Number ISO 4869-3
Publication Date Aug. 31, 2007
Language en - English
Page Count 22
Revision Level
Supercedes
Committee EH/1/1
Publish Date Document Id Type View
Aug. 31, 2007 BS EN ISO 4869-3:2007 Revision