一种结合室内空间剖分的声线跟踪法

A ray tracing method based on indoor space partitioning

声线跟踪法是应用于室内声场预测的几何声学模拟经典方法之一,但该方法的计算效率随着室内空间布局复杂度的增加而降低。为了高效地应用于各种室内空间布局,提出了一种结合室内空间剖分的声线跟踪法,该方法将整个室内空间剖分成有限个凸多面体子空间,以减少在声线跟踪过程中与声线求交点的墙面数量,并省略了碰撞点有效性判断,显著提高了计算效率,尤其适用于大型复杂的室内空间布局。

As one of the typical methods for geometrical acoustic simulation, the ray tracing method has been widely applied to predict indoor sound fields, but its computational efficiency reduces as the complexity of indoor space increases. In this paper, a ray tracing method based on indoor space partitioning is proposed which can be applied to all kinds of indoor space layouts. By dividing the entire indoor space into limited convex polyhedron subspaces, this method could reduce the number of walls intersected with rays and omit the validity test of the collision point as well. As a result, it enhanced the computational efficiency. And it is suitable for the huge complex layouts of indoor space.