Analysis of Influence of Array Baffles on Receiving Signals of Microphone Array

Aiming to develop a new type of sentinel system and provide theory basis for array design with baffles,the influence of array baffle on the receiving signals of microphone array was studied. The sound field around the cylinder was analyzed using plane wave decomposition theory and method based on an array model of a uniform circular microphone array mounted on a rigid cylinder. The redundancy error caused by sampling the continuous circular array using discrete circular array was studied and the influence of the space between the array and array baffle and baffle impedance on the array receiving signals was analyzed. The relationship of amplitude and phase-depended response of array received signals with array radius was achieved,the relationship of redundancy error and the number of array elements and array radius was derived,and the influence of the space and impedance on the array receiving signals was analyzed. The research results provide a theoretical basis for microphone array design considering the influence of array baffles in engineering applications.