虚声源与表面积分相结合的室内声场模拟方法

Hybrid method of image source model and diffuse surface integration for the simulation of room sound field

提出考虑声线在各界面间进行扩散反射的计算机模拟新方法 ,从全局上考虑了声源对每一个接收点的直达声 ,以及整个界面对每个接收点的镜像和扩散反射声能 .该方法物理概念清晰 ,数学模型简单 ,计算机模拟方法易行 ,提高了计算效率 ,更提高了模拟准确度 .还对提出的方法进行了计算机模拟和实际测量的比较 ,证明了数理模型的正确性和计算机仿真方法的准确性和可行性 .该方法可用于厂房、办公室等场所的噪声控制及室内音质设计的实践中 ,并可进一步应用于声场可听化研究 。

A new computer simulation method considering diffuse reflection on room surfaces-hybrid method of image source model and diffuse surface integration is present. This method handled the complicated diffuse reflection phenomenon with Energy Conversation Law, thus the diffuse sound field can be calculated more precisely and easily. An agreement between the computer simulation results and measurements shows the accuracy of the mathematical and physical model and the applicability of the computer simulation methods. This model can be used to noise control engineering, as well as to the practice of acoustical design.