基于麦克风阵列的三维声源定位算法及其实现

3D sound source localization algorithm and its implementation based on microphone array

从系统的角度对真实声场环境下基于到达时间差的的声源定位算法进行了研究,提出了一种改进的互功率谱相位(CSP)时延估计算法,在此基础上,提出了一种用于定位估计的基于球形差值(SI)的随机梯度下降(LMS)算法。为了验证算法的有效性,实际构建了三维空间中的点声源定位系统。实验结果表明所提出的算法具有较高的定位精度。

Sound source localization based on time difference of arrivals in the acoustic environment is discussed from the systematic perspective. A modified Crosspower-Spectrum Phase （CSP） method is presented for time delay estimation （TDE） while a least mean square （LMS） approach based on the Spherical Interpolation （SI） is followed to derive the source coordinates. To verify the algorithm, a real point source localization system in 3D space is established. Experimental results show that the algorithm gives high accuracy of the source location.