基于声线法的声场脉冲响应计算机模拟研究

On the Computer Simulation of Sound Field Impulse Response Using the Ray-Tracing Method

首先对声场脉冲响应模拟研究的基本状况作了简要介绍 ,然后详细地给出了一种以声线跟踪法为基础的模拟声场脉冲响应的具体算法 ,该算法考虑了声源的指向性和扩散反射的影响。文中以矩形空间为例 ,利用计算机仿真研究了给定点的脉冲响应。同时 ,还着重对声场脉冲响应实际模拟计算过程中的几个重要问题作了探讨 。

Searching in vain for relatively complete information in the world′s open literature, we had to develop an algorithm for predicting the sound field in enclosed space. In developing this algorithm, we had in mind its possible application to auralization and noise control. This algorithm can predict sound propagation throughout the enclosed space, and can simulate the impulse responses at defined points from which various acoustic parameters can be calculated. We describe how to simulate the space, source, receiver and sound propagation based on the classical ray tracing principle. We considered both the directivity of sound source and diffused reflection. We developed the algorithm into a computer program and tested it in a rectangular space to show that it can predict the characteristics of the sound field.