境界要素法による有限な障壁周囲の音場の解析

概要

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The sound field around a finite barrier is analyzed by two- and three-dimensional boundary element methods. These results are compared with the results measured for an experimental model by a sound visualization method using three color-1ight-emitting diodes. In the case of two-dimensional analysis, considering the difference between the distance attenuation of the cylindrical wave caused by a line source and that of the spherical one caused by a point source, the sound pressure levels calculated are corrected to express those for the three-dimensional field approximately. For the sound field on the source side of the barrier, both of the sound pressure distributions calculated by two- and three-dimensional analyses agree fairly well with the measured ones. In the case of the opposite side to the source, the two-dimensional results are in good agreement with measured ones for lower frequencies but become inaccurate for higher frequencies. The three-dimensional results show good distribution patterns of sound pressure levels.
公益社団法人精密工学会の論文
1988-07-05