Abstract
The present invention discloses a piezoelectric panel speaker and an optimal design method of the same. In the structure of the speaker, at least one piezoelectric plate attached at a surrounding frame supports a diaphragm inside the surrounding frame. A spacer is inserted between the each piezoelectric plate and the diaphragm. The structure of the piezoelectric plates fixed at the surrounding frame improves the speaker performance within low frequency range. Besides, the finite element method is employed to build a mathematical model to simulate the radiation loading of the piezoelectric panel speaker. Also, the simulated annealing method is employed to approach the optimal design parameters of the speaker structure.