驻极体电容传声器指向性的有限元仿真分析  

Directionality Simulation and Analysis of an Electret Condenser Microphone Using FEA Method

作　　者：刘帅 史东东 吴昕 雷鸣[1,2] 王辉 林贤[1,2] LIU Shuai;SHI Dongdong;WU Xin;LEI Ming;WANG Hui;LIN Xian(The 3rd Research Institute of China Electronics Technology Group Corporation,Beijing 100015,China;Beijing China Electronics Intelligent Acoustics Technology Co.,Ltd.,Beijing 100015,China)

机构地区：[1]中国电子科技集团公司第三研究所,北京100015 [2]北京中电慧声科技有限公司,北京100015

出　　处：《电声技术》2024年第7期112-117,共6页Audio Engineering

摘　　要：建立驻极体电容传声器声学模型,添加电、力、声的耦合多物理场,并通过有限元仿真计算的方式,获取传声器灵敏度与声波入射方向的极坐标曲线图。通过改变驻极体传声器声学模型中阻抗材料的阻抗参数来仿真分析传声器指向性与阻抗材料阻抗参数的关系。将仿真结果与集中参数电路模型得出的指向性控制结论相比较,验证有限元仿真分析的正确性。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.

关 键 词：电容麦克风 指向性控制 有限元分析(FEA) 多物理场耦合仿真 

分 类 号：TN641[电子电信—电路与系统]