Study on the Beamforming Performance of Microphones Array

Based on the beamforming outputs of the uniform linear array under different conditions,the influence on array performance of the array parameters including the array size,the number of microphones,the frequency of signal,the array opening angle was analyzed.Taking the irregular wheel array for example,the method and process of the simulation analysis for the planar array performance was illustrated.Then,the radial profile of array pattern and the maximum sidelobe levels of typical arrays including regular grid array,cross array,herringbone array,ring array,irregular sector wheel array were simulated and compared.The results showed that both the array parameters and the arrangement layout of microphones have significant effects on the array performance of noise source identification.Finally,the software for analysis of array performance was developed and a powerful tool for the analysis,selection,design and optimum of array performance was obtained.