Directionality Simulation and Analysis of an Electret Condenser Microphone Using FEA Method
The acoustic model of electret condenser microphone is established,coupled with multiple physical fields of electricity,force and sound,and the polar coordinate curves of the sensitivity of microphone and the incidence direction of sound wave are obtained by finite element simulation.By changing the impedance parameters of the impedance material in the acoustic model of a electret microphone,the relationship between the directivity of the microphone and the impedance parameters of the impedance material is simulated and analyzed.The correctness of the finite element simulation is verified by comparing the simulation results with the directivity control results obtained from the lumped parameter circuit model.
condenser microphonedirectivity controlFinite Element Analysis(FEA)multi physical field coupling simulation
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