Abstract
This paper is focused on optimization of piezoelectric panel speakers. Two piezoelectric ceramic plates serve to excite the diaphragm in the speaker. With the optimization procedure, the best position to mount piezoelectric ceramic plates on the diaphragm is determined. A finite element model is established using the energy method, where the electrical system, mechanical system and acoustic loading of the transducer are considered as a coupled system. The simulated annealing (SA) algorithm is exploited to attain low fundamental resonance frequency and high the acoustic output. Experiments were conducted to verify the numerical model. The experimental results were in good agreement with the numerical prediction. The performance of the optimized configuration was significantly improved over the non-optimal design. Copyright© (2010) by the International Congress on Acoustics.