Diaphragm parameters and radiationcharacteristics of multilayer piezoelectricceramic loudspeakers

摘要

This paper presents diaphragm parameters and analysis of radiation characteristics for small size loudspeaker by amultilayer piezoelectric ceramic bimorph diaphragm. The multilayer ceramic wafer is suitable for buttery operatedmobile phones because of its lower electrical impedance nature.Three diaphragm parameter measuring methods are compared to develop the optimum measurement of diaphragmparameters. Then, output sound pressure frequency characteristics of a loudspeaker model with actual acousticalloads are analyzed.