Abstract
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. Studies have been performed on the generation of impact sound due to the collision between a ball and a square steel plate. This fifth report shows the effects of the boundary conditions of the plate on impact sound. For the boundary conditions of a plate, free edge, four point support edge, and clamp edge were selected. When the ball collided with the plate, the pulsatile contact force and impact sound were simultaneously measured. The signals thus obtained were stored in a wave memory instrument and reproduced on a oscilloscope. Furthermore, the signal of impact sound was analyzed by an FFT analyzer. From the results of the analyses and considerations, the effects of the boundary conditions of the plate on impact sound have been clarified.
