Acoustical properties of porous materials : Generalizations of empirical models

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概要

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• Empirical models for the characteristic impedance and propagation constant of porous materials given by Delany and Bazley and by the author are generalized with respect to the porosity, the tortuosity and the pore shape factor ratio. The new models have these three parameters besides the flow resistivity. For a practical use, the impedance model can be described with two parameters, the effective flow resistivity and the ratio of tortuosity to porosity. An excellent agreement with Attenborough's four-parameter model shows that the new models are useful for the prediction of acoustical behavior of a wide variety of ground surfaces.

• 社団法人日本音響学会の論文

著者

• Miki Yasushi

  Faculty Of Engineering Takushoku University

関連論文

• Acoustical properties of porous materials : Generalizations of empirical models
• Determination of a reflecting surface by Hilbert transform method
• Acoustical Properties of porous materials : Modifications of Delany-Bazley models

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