A new impedance-based approach to analysis and control of sound scattering
A new impedance-based approach to analysis and control of sound scattering
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一种新的基于阻抗的声音散射分析和控制方法
DOI：
10.1016/j.jsv.2006.04.030
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发表时间：
2006
影响因子：
4.7
通讯作者：
Y. Bobrovnitskiĭ
中科院分区：
文献类型：
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作者：
Y. Bobrovnitskiĭ
本文对流体介质中任意障碍物的声散射问题提出了一种新的理论解。的散射矩阵表示的三个输入阻抗矩阵定义的流体散射体接口：一个阻抗矩阵描述的散射体和两个矩阵表征的流体。散射矩阵的一般性质进行了研究。提出了一些有用的散射场表示。将通解应用于三个著名的实际问题，得到了一些新的结果或推广了已有的结果。对于第一个问题（最有效的被动吸声器），推导出确定其表面阻抗的方程。对于第二个问题（最佳散射体）也得到了类似的结果。对于第三个问题（如何使物体成为声学透明的），提出了可以实现为智能涂层的“主动”解决方案。计算机模拟说明了结果。
A new theoretical solution to the problem of scattering sound by arbitrary obstacles in a fluid medium is presented. The scattering matrices are expressed in terms of three input impedance matrices defined with respect to the fluid–scatterer interface: one impedance matrix describes the scatterer and two matrices characterize the fluid. General properties of the scattering matrices are studied. Some useful representations of the scattered field are proposed. The general solution is applied to three well-known practical problems for which some new results are obtained or the existing results are generalized. For the first problem (of the most efficient passive sound absorber), an equation that determines its surface impedances is derived. A similar result is obtained for the second problem (of the best scatterer). For the third problem (of how to make a body to be acoustically transparent), “active” solutions that can be realized as smart coatings are proposed. Computer simulations illustrate the results.