Research on Numerical Simulation Method of Direct Field Acoustic Test Platform

In order to guide the construction of direct field acoustic test platform and replace high cost reverberation field acoustic test,a method of equivalent loudspeaker with velocity boundary was proposed. Based on this method,a finite element model of direct field acoustic test was established,and the responses of sound pressure level (SPL) in different regions were compared with that of the reverberation field. The results show that the velocity boundary equivalent method can accurately simulate the directivity and SPL response of the loudspeaker,and the response of the direct field model based on this method are consistent with the reverberation field near the center of the field,which can provide a reference for the selection of reliable test area in the direct field acoustic test.