Sound absorption of porous metals at high sound pressure levels.
J Acoust Soc Am
; 126(2): EL55-61, 2009 Aug.
Article
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| MEDLINE
| ID: mdl-19640016
ABSTRACT
This paper is a study about sound absorption properties of porous metals at high sound pressure levels. A method of deriving the nonlinear static flow resistance for highly porous fibrous metals is proposed by solving Oseen's equation to take account of the inertia effect, validated by experiments of airflow measurement. In order to predict nonlinear sound absorbing performance of a finite thickness porous metal layer, a numerical method is employed, verified by sound absorption measurement in an impedance tube. Accordingly, the effects of the nonlinear coefficient on the porous metal sound absorption are investigated.
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MEDLINE
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En
Revista:
J Acoust Soc Am
Año:
2009
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Article
País de afiliación:
China