移动传声器阵列的稳态声源识别

Identification of Steady Sound Source Using Moving Microphone Array

由于波束形成的传声器阵列声源识别技术存在着识别低频声源的识别分辨率低、识别高频声源的识别易产生空间混叠等的问题,以致影响了声源识别的准确性。为此,对于稳态声源,提出两种传声器阵列移动方法,即改变传声器阵列中心位置、调整测量距离来提高低频声源识别分辨率,和采用旋转传声器阵列进行多次测量的方法来抑制高频声源识别中的空间混叠,从而达到使用较少传声器即可提高声源识别性能的目的。通过仿真和实验验证了此方法的有效性。

The main disadvantages of beamforming technique are the poor spatial resolution at low frequencies, and thespatial aliasing at high frequencies, which will lead to the identification of false sources. This paper introduces two kinds ofmicrophone- array moving methods for identification of steady sound sources. One is to change the position of themicrophone array center and adjust the measurement distance to improve the resolution in low- frequency sound sourceidentification. And the other is to rotate the array for multiple measurements to suppress the spatial aliasing in highfrequencysound source identification so as to achieve the goal of using less microphones to improve the performance of thesound source identification. The effectiveness of this method is verified by simulation and experiment.