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Multiple acoustic diffraction around rigid parallel wide barriers

已有 904 次阅读2009-7-17 17:47

Multiple acoustic diffraction around rigid parallel wide barriers

J. Acoust. Soc. Am. Volume 126, Issue 1, pp. 179-186 (2009); (8 pages)


Hequn Min and Xiaojun Qiu
State Key Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, People's Republic of China

A ray-based method is presented for evaluating multiple acoustic diffraction by separate rigid and parallel wide barriers, where two or more neighboring ones are of equal height. Based on the geometrical theory of diffraction and extended from the exact boundary solution for a rigid wedge, the proposed method is able to determine the multiple diffraction along arbitrary directions or at arbitrary receiver locations around the diffracting edges, including the positions along the shadow or reflection boundaries or very close to the edges. Comparisons between the results of the numerical simulations and the boundary element method show validity of the proposed method.

©2009 Acoustical Society of America

Keywords

acoustic wave diffraction, boundary-elements methods, receivers


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