BS EN ISO 4869-4:2000 PDF

Acoustics. Hearing protectors - Measurement of effective sound pressure levels for level-dependent sound-restoration ear muffs

First page of standard BS EN ISO 4869-4:2000

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Title (English):

BS EN ISO 4869-4:2000

Acoustics. Hearing protectors - Measurement of effective sound pressure levels for level-dependent sound-restoration ear muffs

Format:: Electronic (PDF)
Publication date:: August 15, 2000
ICS:: 13.340.20
Technical committee:: CEN
SKU:: BS EN ISO 4869-4:2000

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Abstract

1 Scope 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.

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BS EN ISO 4869-4:2000 PDF

Abstract

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Abstract

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