多孔質材を貼付した単一板の遮音特性について

概要

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It is well known that application of porous materials on the bare panel improves the ability of sound insulation of the partition. Beranek and others analyzed the sound insulation characteristics of the similar structure based on the assumptions that the mechanical contracts between the bare panel and the porous materials are negligible and that the porous materials are rested. But these assumptions are unrealistic when the porous materials are directly mounted on the panel and they vibrate at the same velocity with each other. In this paper, we analyze the sound insulation or absorption characteristics of this composite structure based on the assumption that the basic panel and the porous materials vibrate at the same velocity with each other, by taking account of the interaction between the solid frame of vibrating porous material and the surrounding fluid. We make some discussions on the increases of transmission loss by the application of the porous materials on the plate and the reciprocal characteristics of the transmission loss.
社団法人日本音響学会の論文
1979-06-01