Theoretical Study on Broadband Underwater Transducer with Double Resonant Mode

A method that can broaden the band of the underwater transducer is theoretically discussed. The factors that affect the band of transducer are analyzed. The simulations by using finite element method (FEM) show that the response band of transmitting voltage can be improved effectively by changing material and size of the middle mass or back mass. The comparison of the results of FEM and the traditional one dimensional equivalent circuit method demonstrates that the latter method can also be used to design this type of transducer. Some laws in designing this type of broadband transducer summarized.