接收点移动的室外虚拟声场模拟研究与应用  

Research and application of outdoor sound field in virtual environment for mobile receiver

作　　者：谭同德[1] 史晓菲[1] 赵新灿[1] 常村红[1] 

机构地区：[1]郑州大学信息工程学院,郑州450001

出　　处：《计算机应用》2009年第6期1547-1550,共4页journal of Computer Applications

基　　金：国家973计划项目(2002CB312103);河南省自然科学基金资助项目(0611051900)

摘　　要：声线跟踪算法是一种目前较为流行的基于几何声学声场模拟算法,但该方法依赖于特定接收点的位置,因此不能直接用于接收者处于不断移动状态的虚拟环境中。对此,提出一种步长法动态定义接收点位置的改进声线跟踪算法,有效解决了声场仿真中听音效果与计算效率的冲突问题,尤其适合于大规模室外虚拟环境中声场的模拟研究。并用Visual Studio2005和Matlab工具完成程序设计和结果处理,达到满意的听音效果和计算效率。Ray-tracing is one of the most widely used ways of sound field simulation, but it usually depends on the specific location of the receiving point; therefore, it cannot be used in virtual environment with a mobile receiver directly. A method of step-length by defining the receiver dynamically based on ray-tracing was proposed, which solved the problem between sound effect and computational efficiency, especially for the outdoor sound field simulation in large-scale virtual environments. The improved algorithm was implemented in VS 2005 and Matlab, and it can achieve satisfactory sound effect and computational efficiency.

关 键 词：室外声场 步长法 声线跟踪 脉冲响应 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]