基于声传播算子的声源定位实验模拟方法研究  

Numerical modeling of a sound localization experiment based on the acoustical wave propagator

作　　者：林志斌[1] 卢晶[1] 徐柏龄[1] 

机构地区：[1]南京大学声学研究所近代声学重点实验室,南京210093

出　　处：《应用声学》2008年第5期374-379,共6页Journal of Applied Acoustics

基　　金：国家自然科学基金(No.60340420325和No.10604030);博士点基金项目(No.20040284038)

摘　　要：声传播算子是一种高效的时域声场计算方法,它能够很方便地计算出给定系统参数下任意时刻任意位置的声场变化情况,本文采用这种方法计算所得的二维房间声场信息进行传声器阵列的声源定位仿真实验。计算结果表明,用该方法获取的阵列数据能有效地应用于阵列信号处理算法中,准确地估计出初始高斯脉冲声源的方向。声传播算子声场计算方法能为传声器阵列声源定位的实验提供方便,使得传声器阵列声源定位算法在不同混响时间的鲁棒性实验研究变得更加简捷。The acoustical wave propagator is a highly efficient technique for the calculation of the time-domain evolution of the acoustical wave at any time and position with given acoustical parameters. In this paper, the acoustical wave propagator is applied to a sound localization problem in the environment of a two-dimensional room. Simulation results illustrate that the signals acquired by this technique can be used in the algorithm of array signal processing efficiently. As a result, the technique of acoustical wave propagator provides a feasible experiment simulation method for sound localization using microphone array, which makes the experiment research of the robustness of a sound localization algorithm at various reverberation time more conveniently.

关 键 词：麦克风阵列 延迟估计 声源定位 声传播算子 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TN912.3[自动化与计算机技术—控制科学与工程]