Abstract
Coincidence effect is important phenomena for development of sound insulation structures. Theoretical understanding concerning coincidence effect of infinite plate has been established, but detailed examination of a finite plate is not enough. In this paper, as a first step of detailed study on coincidence effect of a finite plate, vibration of the rectangular plate which is excited by sound pressure from a point source is simulated by using acoust-structural coupled analysis technique by BEM and FEM. And coincidence phenomena of a finite plate is visualized through comparison between surface distribution of sound pressure acting on the plate and vibration velocity of the plate.
