Effect of a honeycomb on the sound absorption characteristics of panel-type absorbers

Panel-type sound absorbers are commonly used to absorb low-frequency sounds. Recently, a new type of panel/membrane absorbers has been proposed as a next-generation sound absorber free from environmental problems. On the other hand, it is known that placing a honeycomb structure behind a porous laye...

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Bibliographic Details
Published in:Applied acoustics 2011-12, Vol.72 (12), p.943-948
Main Authors: Toyoda, Masahiro, Sakagami, Kimihiro, Takahashi, Daiji, Morimoto, Masayuki
Format: Article
Language:English
Subjects:
Applied sciences
Building insulation
Buildings
Buildings. Public works
Exact sciences and technology
External envelopes
Honeycomb
Panel-type absorber
Sound absorption
Sound insulation
Sound transmission
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Summary:Panel-type sound absorbers are commonly used to absorb low-frequency sounds. Recently, a new type of panel/membrane absorbers has been proposed as a next-generation sound absorber free from environmental problems. On the other hand, it is known that placing a honeycomb structure behind a porous layer can improve sound absorption performance and a similar effect can be obtained for microperforated-panel absorbers. Herein, the sound absorption characteristics of a panel sound absorber with a honeycomb in its back cavity are theoretically analyzed. The numerical results are used to discuss the variations in the sound absorption characteristics due to the honeycomb as well as the mechanism for sound absorption.
ISSN:0003-682X
1872-910X
DOI:10.1016/j.apacoust.2011.05.017