Research on Transmitting Directivity of Combined Low-Frequency Bender Disk Transducer

A method to obtain the directivity of the combined low-frequency bender disk transducer, which combines the monopole beam formed by the in-phase radiation and the dipole beam formed by the anti-phase radiation, has been developed. In this work, we establish the finite element model of the two-element combined low-frequency bender disk transducer, simulate the transmitting beam and obtain low-frequency directional transmitting beam patterns. Finally, the prototype of a combined low-frequency bender disk transducer is designed and manufactured, and the transmitting directivity of the transducer is measured in an anechoic water tank. The experimental results show that the combined bender disk transducer can obtain good directivity at 1600-1900 Hz by adjusting the ratio of the monopole beam and the dipole beam.