Measurements of acoustics properties for level-dependent ear-muffs
The aim of this paper is to present methods of acoustic measurements of level-dependent ear-muffs with an electronic sound restoration system switched off and on, according to EN 352-4. Measurements of sound attenuation and H, M, L criterion levels were carried out for a model of a...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Institute of Fundamental Technological Research Polish Academy of Sciences
2003-01-01
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| Series: | Archives of Acoustics |
| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/441 |
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| Summary: | The aim of this paper is to present methods of acoustic
measurements of level-dependent ear-muffs with an electronic sound restoration
system switched off and on, according to EN 352-4. Measurements of sound
attenuation and H, M, L criterion levels were carried out for a model of a
level-dependent earmuff. The acoustic properties of test sites, sound field
requirements and test signals are discussed. Measurements of sound attenuation
were carried out in a chamber for testing hearing protectors. The chamber
fulfilled the requirements of PN-EN 24869-1. Measurements of the H, M, L
criterion levels were carried out in a reverberation room where the sound field
of the test site complied with the requirements specified in ISO/DIS 11904-1.
Both the chamber for testing hearing protectors and the reverberation room are
the part of the laboratory of noise in the Central Institute for Labour
Protection in Warsaw, Poland. |
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| ISSN: | 0137-5075 2300-262X |