应用于传声器阵列定位校准的空间点声源声场拟合方法

介绍了一种用于传声器阵列声源定位精度校准的空间点声源声场模拟方法,并基于该方法设计了一套空间点声源模拟系统,完成了一个传声器阵列的定位位置精度校准。文章采用多通道点声源空间声场合成算法模拟了一个位于自由场空间的点声源,根据传声器阵列中每一个传声器的空间位置坐标,计算出传感器所处位置声场的动态声信号。通过耦合腔标准声源将对应的多通道电压信号输入被校准阵列系统,完成点声源的模拟。然后,该阵列运用波束形成算法进行声源定位,得出点声源的位置,并与模拟点声源的位置进行比对,实现对阵列定位准确性的校准。

Sound field fitting method of spatial point source for microphone array positioning calibration

In this paper, a sound field reconstructing method of spatial point source is introduced to the calibration of microphone array. Based on this method, a set of spatial point source reconstruction system is designed, and the positioning accuracy calibration of a microphone array is completed. In this paper, the spatial sound field synthesis algorithm of multi-channel sound sources is used to simulate a point source in a free spatial sound field. According to the spatial coordinates of each microphone in the microphone array, the dynamic acoustic signal of the sound field at the microphone''s position is calculated. The coupling cavity standard sound source inputs the corresponding multi-channel voltage signals into the calibrated microphone array system to simulate point sound sources. By comparing the position of the simulated point source with that obtained by beamforming of the microphone array, the accuracy of microphone array positioning can be calibrated.