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Technische Regel
ISO/TR 4869-3:1989
Issue date: 1989 11 30
Acoustics — Hearing protectors — Part 3: Simplified method for the measurement of insertion loss of ear-muff type protectors for quality inspection purposes
The procedure specified may be used to investigate production spreads of performance as part of type approval or certification procedures and the change of performance wi...
Withdrawn: 2007 06 26
Publisher:
International Organization for Standardization
Format:
Digital | 7 Pages
Language:
English
Currently valid:
ICS
The procedure specified may be used to investigate production spreads of performance as part of type approval or certification procedures and the change of performance with age. It is not intended to be used as the basic test for type approval purposes. Performance data obtained are not to be quoted as representing the real-ear sound attenuation of an ear-muff, nor the protection provided by the ear-muff.
ISO 4869-3:2007
2007 06 26
Acoustics — Hearing protectors — Part 3: Measurement of insertion loss of ear-muff type protectors u...
Norm
ISO/TR 4869-3:1989
1989 11 30
Acoustics — Hearing protectors — Part 3: Simplified method for the measurement of insertion loss of ...
Technische Regel
↖
Norm
Issue date :
2007 06 26
Acoustics — Hearing protectors — Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture
