文献类型：期刊文献

英文题名：Fast prediction of scattered sound field based on Fourier diffraction theory under second-order born approximation

作者：Zhang, Peizhen[1,2];Wang, Shuozhong[1]

机构：[1]Shanghai Univ, Sch Commun & Informat Engn, Shanghai 524088, Peoples R China;[2]Guangdong Ocean Univ, Sch Informat, Zhanjiang 524088, Peoples R China

年份：2014

卷号：60

期号：4

起止页码：379

外文期刊名：ACOUSTICAL PHYSICS

收录：SCI-EXPANDED(收录号：WOS:000339380800003)、、EI(收录号：20143017972629)、Scopus(收录号：2-s2.0-84904343243)、WOS

基金：This work was supported by the Natural Science Foundation of China under grant no. 61071187 and the Public Science and Technology Research Projects of Ocean Engineering (201305019).

语种：英文

外文关键词：sound scattering; directional pattern; fast prediction; Fourier diffraction theorem (FDT); Born approximation

外文摘要：The directional pattern of sound waves scattered from an object insonified by a plane wave can be efficiently predicted using the Fourier diffraction theorem (FDT). This is achieved by sampling a circle in the discrete Fourier transform of the object/medium distribution. However, the FDT-based approach under the first-order Born approximation is only applicable to weak scattering. To improve the prediction accuracy and expand the method's scope of applications, we introduce a second-order correction term to the solution, which is obtained by taking the first-order scattered waves as secondary incident sources, and calculate the "scattering" in the same way as in the first-order FDT-based approach. Adding the resulting correction term to the directional pattern based on the first-order Born approximation, the second-order prediction is obtained. Numerical results show that the proposed method can provide improved directional patterns of the scattered waves, and the range of applicability is significantly expanded.