113 スズムシの発音メカニズム : 翅の振動モード解析に基づく検討(サイレント工学I:放射音響の推定)(OS.04 : サイレント工学)

概要

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This paper deals with the sound generating mechanism of a bell cricket in order to apply the mechanism to convert the noises of machines into comfortable sound. Firstly the wing motion of a bell cricket was observed by a video camera when a cricket sang and the sequences of singing motion was analyzed. Secondly, the details of the file and rubbing parts on the wings were also observed with a scanning electron microscopy. Thirdly, the frequency spectrum of bell cricket sounds was analyzed by FFT and the main frequencies of singing were then found. Fourthly, the natural modes of flexural vibration of a wing were experimentally analyzed by exiting the wing with a piezoactuator and detecting the motion of vibration with a microscopic laser vibrometer. . Fifthly, the natural modes of flexural vibration of a wing were analyzed by FEM model of wing. Finally, the sound generating mechanism of bell cricket was studied comparing these results.
一般社団法人日本機械学会の論文
2001-08-03