Design and Analysis of PZT-Based Piezoelectric Speakers

Piezoelectric speakers work on the inverse piezoelectric effect to produce sound. When voltage is applied to the speaker, it will create waves of sound. When acoustic voltage signals are put across the ceramic part of the piezoelectric speakers, it leads to the oscillation of the material. In the following paper, an analysis for the design of efficient piezoelectric-based speaker is carried out. A novel simulation has been executed to find the behaviour of the piezo structure under the influence of magnetic field. Displacements of diaphragm under different magnetic field strengths have been analysed. The fundamental design requirements like oscillations in the audible frequency range and maximum surface displacement have been considered. A circular PZT disc is modelled and analysed practically for variation in thicknesses and diameters of its plate on COMSOL Multiphysics. For studying the stationary and dynamic performances of the PZT disc, simulation of the disc for a set range of frequency using COMSOL Multiphysics is done. The magnetic response of the PZT disc of 40 mm diameter has also been studied. This proposed analysis can further assist in the conversion of anything into a speaker.