Frequency equation of a sandwich transducer with complex transformer
Lei Qin · Zhendong yu chongji · 2011
A sandwich transducer with complex transformer was proposed and designed.Based on the electro-mechanical equivalent circuit theory,the model of the sandwich transducer was built,and the frequency equation was deduced.Considering the influence of the latten electrodes on the density and the equivalent sound velocity,a modification of this equation was given using the equivalent parameter theory.Transducers were prepared to validate this modification,the error between the calculation and the experimental results reduced from 2.09%(before modification) to 0.64%(after modification).