Wall-driven oval ring transducer

摘要

This invention is a small light weight underwater transducer that operates at low frequencies. The foregoing is accomplished by embedding piezoelectric material in the wall of an oval shell between the shell's nodal points. When an alternating voltage is applied to the piezoelectric material, the piezoelectric material expands and contracts causing large circumferential strains in the shell of the transducer. The aforementioned strains cause the shell to vibrate and energy to be radiated into the water. This invention may also be used as a receiving type of transducer.