A three-parameter analytical model for the acoustical properties of porous media.
A three-parameter analytical model for the acoustical properties of porous media.
复制标题
多孔介质声学特性的三参数分析模型。
DOI：
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发表时间：
2019
影响因子：
2.4
通讯作者：
J. Groby
中科院分区：
文献类型：
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作者：
K. Horoshenkov;Alistair Hurrell;J. Groby
许多预测多孔介质声学特性的模型都需要非声学参数，其中很少有可直接测量的参数。 Johnson、Champoux、Allard 和 Lafarge 提出的一种流行的预测模型 [J.应用。物理。 70(4), 1975-1979 (1991)]（459 次引用，Scopus，2019 年 4 月）需要六个非声学参数。本文证明，在 Johnson-Champoux-Allard-Lafarge 模型中使用三个以上的参数根本没有必要。在这里，作者提出了理论和实验证据，表明一系列孔径分布接近对数正态分布的多孔介质（颗粒、纤维和泡沫）的声阻抗可以仅通过孔隙率、中值孔径和孔径标准差的知识来预测。本文的一个独特之处在于，它有效地将非常准确地预测多孔介质声学特性所需的参数数量减少了一半。本文的意义在于，它提出了具有对数正态孔径分布的多孔介质的孔隙微观结构和关键声学特性之间的明确关系。这种独特的模型非常适合使用声学数据来测量和反演各种多孔介质的关键非声学特性，这些多孔介质用于一系列不一定是声学的应用。
Many models for the prediction of the acoustical properties of porous media require non-acoustical parameters few of which are directly measurable. One popular prediction model by Johnson, Champoux, Allard, and Lafarge [J. Appl. Phys. 70(4), 1975-1979 (1991)] (459 citations, Scopus, April 2019) requires six non-acoustical parameters. This paper proves that the use of more than three parameters in the Johnson-Champoux-Allard-Lafarge model is not necessary at all. Here the authors present theoretical and experimental evidence that the acoustical impedance of a range of porous media with pore size distribution close to log-normal (granular, fibrous, and foams) can be predicted through the knowledge of the porosity, median pore size, and standard deviation in the pore size only. A unique feature of this paper is that it effectively halves the number of parameters required to predict the acoustical properties of porous media very accurately. The significance of this paper is that it proposes an unambiguous relationship between the pore microstructure and key acoustical properties of porous media with log-normal pore size distribution. This unique model is well suited for using acoustical data for measuring and inverting key non-acoustical properties of a wider range of porous media used in a range of applications which are not necessarily acoustic.