NF EN 24869-3

March 1994

Standard Cancelled

Acoustics. Hearing protectors. Part 3 : simplified method for the measurement of insertion loss of ear-muff type protectors for quality inspection purposes

Main informations

Collections

National standards and national normative documents

Publication date

March 1994

Number of pages

7 p.

Reference

NF EN 24869-3

ICS Codes

13.340.20 Head protective equipment

Classification index

S31-062-3

Print number

1 - 01/03/1994

International kinship

ISO/TR 4869-3:1989

European kinship

EN 24869-3:1993

Standard replaced by (1)

NF EN ISO 4869-3

October 2008

Standard Current

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

ISO 4869-3:2007 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 ISO 4869-3:2007 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.

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