Elastic sound absorption theory of fibrous material
by Xin an Zhang
International Journal of Vehicle Noise and Vibration (IJVNV), Vol. 4, No. 3, 2008

Abstract: Because of the complexity of classical sound absorption theory's expressions, it is difficult to obtain physical insight into the acoustic behaviour of porous materials and to determine the dominant mechanism for sound absorption for a given material at a given frequency. Alternatively, there are very simple expressions. A new theory has been put forward that fibrous material absorbs sound by the fibre's fluctuation. This theory has been justified by the equation obtained from the vibration analysed in this paper as well as the empirical sound absorption formula of fibrous material in the author's previous paper.

Online publication date: Mon, 08-Dec-2008

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