Studies on impact sound. (4th report. Sound generation at impact side).
Teruo Igarashi, 直喜 宮山 · TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C · 1988
In view of the troublesome nature of impact sound, a series of studies have been undertaken in order to find out a way to reduce this effect. This fourth report concerns the generation of impact sound at the impact side when a ball collides with a plate. Simply, a ball including a small accelerometer was collided with a freely suspended square steel plate. The pulse-like ball acceleration during the impact, the vibration of the plate, and the impact sounds at the impact and the anti-impact sides were measured simultaneously. These signals were stored in a wave memory instrument and analyzed by an FFT analyzer. From the results of analysis and considerations, it was found that the sound of the pulse at the impact side was composed of the direct sound and the reflected sound from the ball, and the sound due to the deformation velocity of the plate, etc. As a result, the generation of impact sound at the impact side has been clarified.