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Norm
ÖNORM EN ISO 4869-4
Issue date: 2000 09 01
Acoustics - Hearing protectors - Part 4: Measurement of effective sound pressure levels for level-dependent sound-restoration ear-muffs (ISO/TR 4869-4:1998)
This Technical Report specifies a physical test method for level-dependent sound-restoration ear-muffs. The physical measurements are made with the acoustic test fixture ...
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Withdrawn
: 2019 06 01
Publisher:
Austrian Standards International
Format:
Digital | 10 Pages
Language:
German
| English
| Download GER/ENG
Optionally co-design standards:
ICS
This Technical Report specifies a physical test method for level-dependent sound-restoration ear-muffs. The physical measurements are made with the acoustic test fixture (ATF) according to ISO/TR 4869-3 or with a suitable head and torso simulator (HATS) with a suitable acoustic isolation (see clause 7). The results of these tests in
combination with the results from the ISO 4869-1 tests can be used to estimate the effective A-weighted sound pressure level when sound restoration ear-muffs are worn.
The method described is not suitable for measurement of the effective sound pressure level under ear-muffs in the case of impulsive noise nor for active noise reduction ear-muffs.
ÖNORM EN ISO 4869-4
2000 09 01
Acoustics - Hearing protectors - Part 4: Measurement of effective sound pressure levels for level-de...
Norm
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Norm
ISO 4869-2:1994
Issue date :
1994 08 18
Acoustics — Hearing protectors — Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn
Norm
ISO 4869-1:1990
Issue date :
1990 12 20
Acoustics — Hearing protectors — Part 1: Subjective method for the measurement of sound attenuation
Norm
ISO 4869-2:2018
Issue date :
2018 10 04
Acoustics — Hearing protectors — Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn
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
Technische Regel
ISO/TR 4869-4:1998
Issue date :
1998 10 01
Acoustics — Hearing protectors — Part 4: Measurement of effective sound pressure levels for level-dependent sound-restoration ear-muffs