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, first of all, coincidence phenomena of the square plate which is excited by sound pressure from a point source is visualized by using acoust - structural coupled analysis technique, and the feature of coincidence phenomena of finite plate is explained. And then it is ascertained that non-coupled analysis of the plate excited by mechanical force which is more simple and more easy than coupled analysis of the plate excited by sound pressure is available for simulation of coincidence effect of finite plate.
