基于麦克风阵列的声源定位系统

摘要

The precise near field model of sound transmission was deduced. Generalized Cross Correlation ( GCC) algorithm based on Phase Transform (PHAT) was adopted to estimate time-delay, and a time-delay selection algorithm based on data relation was also put forward. Then the time difference of arrival algorithm was used for sound source localization, by which the development platform was built based on the DSP auditory localization hardware system. The results show that the error of the angle estimate is less than 3° in near field model of sound transmission.%推导出声音传播的近场模型,采用相位变换(PHAT)作为加权函数的广义互相关算法(GCC)完成时廷差估计,再采用基于数据关联的时延选择算法选择时延,最后使用到达时延差的算法估计声源方位,并在算法模型的基础上搭建了基于数字信号处理器(DSP)的声源定位硬件系统开发平台.实验结果表明,在声音传播的近场模型下该系统角度估计误差不大于3°.