Diffraction Sound Field by a Circular Aperture in the Side Surface of a Rectangular Enclosure

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概要

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• The diffraction sound field generated by a circular aperture in the surface of a rectangular enclosure containing a sound source inside is theoretically and experimentally investigated to examine the applicability of Pierce's approximate solution of sound diffraction by a three-sided semi-infinite wall to finite three dimensional bodies ; and to obtain the properties of diffraction sound field around the enclosure through a sound visualization method. The distribution of sound pressures around the enclosure is numerically evaluated by applying Pierce's approximate solution, and compared with experimental results obtained using a sound visualization device consisting of an electronic switch circuit system composed of three color-light-emitting diodes, installed on a microphone, functioning to the magnitude of sound pressure level ; a microphone scanning device ; and a photographing set. The computed results agree fairly well with experimental ones.

• 一般社団法人日本機械学会の論文

著者

• Maruyama Akira

  Muroran Institute Of Technology

• NISHIDA Kohshi

  Muroran Institute of Technology

関連論文

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