基于镜像源方法的室内声场脉冲响应仿真

针对基于室内声场脉冲响应描述声场音质特性时其精确度不高的问题,以经典镜像源方法为核心,讨论了基于变换频域和反射系数的改进算法.以矩形空间为具体实例,给定接收点和声源位置,并利用计算机仿真室内声场脉冲响应.在不同参数条件下,对各个算法进行了分析,估计了能量衰减曲线和房间混响时间.结果表明,基于变换频域和反射系数的改进算法具有更高的准确性和可靠性.

Simulation for impulse response of room acoustic field based on image source method

In order to solve the problem that the accuracy in describing the sound quality characteristics of acoustic field based on the impulse response of room acoustic field is not high, the classical image source method(ISM)was taken as the core, and the improved algorithms based on the transformation frequency domain and reflection coefficient were discussed. In addition, the rectangular space was taken as the specific example, the receiving points and sound source locations were given, and the impulse response of room acoustic field was simulated with the computer simulation. According to different parameters, the various algorithms were analyzed. In addition, the energy decay curve(EDC)and room reverberation time(RT)were estimated. The results show that the improved algorithm based on transform frequency domain and reflection coefficient has higher accuracy and reliability.