基于麦克风阵列多声源定位的新方法

针对传统方法不能准确地测量远场多声源位置的问题,提出了在近场和远场都能用的多声源定位新方法.该方法采用两个L型麦克风阵列,在每个阵列通过多声源的频率及到达角的联合估计求得信号源的夹角,基于每个信号源的夹角对估计多声源的位置.通过仿真实验验证了该方法在近场、远场都能准确地测量多声源位置,通过调节两个L型麦克风阵列之间的距离能得到误差在5%以下的声源定位精度.

A New Localization Method of Multiple Sound Sources Based on Microphone Array

In order to solve the problem that the traditional methods could not accurately measure the localization of multiple sound sources in far field,this paper presented a new multiple sound sources localization method,which could be used both in the near field and the far field.Two L-shape microphone arrays were used in the proposed method.In each array,signal’s DOA was obtained by jointly estimating the DOA and frequencies of signals.Finally,locations of multiple sound sources could be estimated based on DOA’s pair of two L-shape microphone arrays.The simulation examples indicated that locations of multiple sound sources could be accurately measured by the proposed method.By adjusting the distance between two L-shape microphone arrays,the standard deviation below 5% could be obtained,which showed the sound localization accuracy.