基于声线跟踪法的室外声场仿真

Outdoor sound field simulation based on ray-tracing algorithm

大部分声场仿真侧重于在室内封闭声场的前提下研究声场能量脉冲响应,进而获得其他声学参数,而室外声场环境由于差别较大,考虑因素较多因此研究较少。该文在经典声线跟踪法的基础上,通过构建虚拟环境中室外声场模型,提出了步长法动态定义接收点的声线跟踪法;在考虑室外环境因素的前提下,模拟计算出不同位置处的能量脉冲响应,经实验验证具有较好的效果。

Most of the sound field simulation focuses on researching the impulse response in closured sound field,and then calculates other sound parameters,due to various environment in outdoor sound field,there is less research.A model of the outdoor sound field in virtual environment is constructed on the basis of the algorithm of ray-tracing in this paper,then an algorithm of step-length by defining the receiver dynamically is proposed,considering the outdoor sound field in environment,the impulse response in different positions are calculated.Then the algorithm proves the effectiveness.