衝突音に関する研究 : 第3報,板の自由振動による音の減衰特性

概要

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Sounds generated from the impact of a boll and a freely suspended square plate were investigated in order to obtain basic information for the reduction of sound. The pulsatile contact force of the ball and the plate, impact sounds and vibrations of the plate were simultaneously measured. By analyzing these signals, the relationships between the initial amplitude of the sound pressure and contact force are shown for the plate material and its thickness. Furthermore, it is found that the damping characteristics of the frequency components, which have a great deal of influence on the initial damping factor of the sound, are related to the critical frequency of the plate. As a result, the damping characteristics of the sound caused by free vibrations of the plate have been clarified in the case of a collision between the ball and the plate, providing an insight into the mechanism of impact sound occurrence.
一般社団法人日本機械学会の論文
1985-11-25