抄録
In this paper the authors propose 3 dimensional simulation of the speaker array considering reflection of a floor and an obstacle by FDTD (Finite difference time domain) method. Because it is necessary we set the condition that was suitable to simulate influence of the speaker array space. This paper describes changeable rate of sound absorption by combination of FDTD method and image source method and two new data about sound spot formed by speaker array. One is what kind of influence the sound spot formation by speaker array takes by reflection on a floor and, another is whether sound spot is formed when there was an obstacle in speaker array space.
