Abstract
The invention provides a parameter identifying method applied to an electret speaker simulation platform and the optimization method thereof. The electret speaker comprises an electrical system, an acoustic system and a mechanical system so that analysis and simulation can be processed by using electrical and acoustic analog circuit. The electrical system and the acoustic system are mapped into the mechanical system. The mechanical system and the acoustic system are coupled to a mechanical-acoustic system and simplified to a two-level system. Parameters of the mechanical-acoustic system can be obtained by planting the electret speaker in air-tight test box for measurement. The parameters are substituted in the electrical and acoustic analog circuit for creating complete mechanical and acoustic analog circuit. It can be used as a simulation platform of the electret speaker for accurately simulating sound pressure response of the electret speaker. The invention also provides a method of optimizing the electret speaker structure so that the sound pressure response and the working bandwidth of the electret speake can be raised by adjusting structural characteristics.