Effect of absorptive surfaces on the sound diffraction by a right angle wedge

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概要

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• Diffraction of plane sound wave incident upon a 90°wedge with arbitrary surface impedance is analyzed on the basis of Maliuzhinets' solution of the sound diffraction by an impedance wedge. The diffraction coeffcient is modified to yield a simple expression which shows the impedance dependence of the diffracted field explicitly. A uniform asymptotic solution is given for the diffraction field near shadow boundary and reflection boundary. Some numerical examples are given to investigate the dependence of diffracted field on the surface impedance. Experimental results are also given for a wedge composed of plywood panels with the absorptive surface using glass wool boards. Both numerical and experimental results show good agreement in representing the trends in excess barrier attenuation due to the impedance surface.

• 社団法人日本音響学会の論文

著者

• Lee Byung-ho

  Department Of Mechanical Engineering Korea Advanced Institute Of Science And Technology

• Lim Byoung-Duk

  Acoustics Laboratory,Korea Standards Research Institute

• Lim Byoung-duk

  Acoustics Laboratory Korea Standards Research Institute

関連論文

• Effect of absorptive surfaces on the sound diffraction by a right angle wedge

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