Abstract
The diffracted sound field around a rectangular enclosure is computed by Boundary Element Method (BEM). In the computation, the field is analyzed by 2-dimensional BEM, by means of converting the distance-damping effect due to spherical wave. The distribution of sound pressures around the enclosure is numerically evaluated by this method, 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.
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