虚拟环境中声模拟关键技术研究

现代建筑对声光环境要求不断提高 ,室内声学模拟已成为建筑虚拟现实的重要组成部分。本文在分析声模拟过程的基础上 ,基于改进的辐射度算法 ,考虑声音穿越障碍时的衍射行为 ,研究了基于遮挡因子的声波衍射处理方法 ,进而给出了声学传递特性仿真和真实感声音生成理论等声模拟过程中的关键技术。并以此为基础构造了相应的仿真算法 ,从而为建筑厅堂声光虚拟环境的构建奠定了基础。为了验证本文方法的有效性 ,搭建了一个声模拟试验平台 ,对具有球形遮挡物的单声源室内声场进行模拟 ,得到了室内声场的分布和各接收器的单位脉冲相应和声传递函数 ,通过对模拟结果分析比对 ,文中提出的声模拟算法是正确而有效的

The investigation of simulating technique of acoustics in visual reality

Along with the standing requirement to acoustic and optical environment in modern architecture,acoustic simulation has become more and more important in Virtual Reality of buildings.On the basis of acoustic simulation process analysis,the technology of acoustic simulation is developed based on update radiosity algorithm in this paper. The diffraction has been considered when barrier exist,and the key technology. Then acoustic simulation algorithm is developed to generate real like sound.An acoustic simulation testbed is established to verify the validity.The relibility of acoustic simulation theory and algorithm is showed by the simulation results.