平面振膜换能器仿真方法研究

Research on Simulation Method of Planar Diaphragm Transducer

摘要: 针对平面振膜换能器难以用集中参数系统常见的电–力–声类比的方法对其声学性能进行快速预测的问题，本文通过理论–仿真–测试相结合的方式，对圆形平面振膜进行了研究，通过“等效”集中参数的方法，得到了圆膜在强迫力作用下的平均位移、有效辐射面积、等效质量、等效顺性及圆膜振动时的等效同振质量等参数随频率变化的规律，并将该结果应用于平板扬声器的声学曲线计算及仿真中，与实测曲线进行了对比。结果表明，通过该方法计算得到的扬声器的声学曲线与实测曲线有较高的吻合度，具有一定的参考价值。

Abstract: Aiming at the problem that it is difficult for planar diaphragm transducers to quickly predict their acoustic performance using the common electro-mechanical-acoustic analogy method of the cen-tralized parameter system, this paper combines the theory-simulation-test method to the circular plane. The diaphragm was studied, and the average displacement, effective radiated area, equiva-lent mass, equivalent compliance, and equivalent mass of the circular diaphragm under vibration were obtained by the “equivalent” concentrated parameter method. The parameters of vibration quality and other parameters change with frequency, and this result is applied to the calculation and simulation of the acoustic curve of the flat panel loudspeaker, which is compared with the measured curve. The results show that the acoustic curve of the loudspeaker calculated by this method has a high degree of agreement with the measured curve and has a certain reference value.