半円筒凹形剛壁上の3次元高周波音場解析

概要

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A previous analysis of high-frequency acoustical pressure fields on a surface excited by a line source on a semicylindrical concave rigid wall is extended to a three-demensional case for a point source excitation. 1) Acoustical ray and integral form interference field representation, 2) acoustical ray and Whispering Gallery mode representation, and 3) near field perturbation representation are explored. The physical interpretation and the error criterion of these alternative field representations are discussed with numerical evaluations. Furthermore, field representations in the multiplications form of acoustical pressure fields on a plane rigid wall and the function taking into account of effects due to the concave surface with a constant radius of curvature are discribed. As for the two-dimensional case, a combination of rays and Whispering Gallery modes provides a physically appealing method for calculating the acoustical fields.
社団法人日本音響学会の論文
1985-02-01