The Class IV flextensional transducer is a typical low frequency, high-power and small size transducer. The
bandwidth of the Class IV flextensional transducer is narrow for its high mechanical quality factor. For improving its
bandwidth capability, a configuration of broadband flextensional transducer was proposed according to the theory of
multiple-mode-coupling. The transducer driven by piezoelectric ceramic PZT-4 was designed and analyzed using finite
element software ANSYS. The transmitting voltage response of the transducer reached to 131.5dB with ripple 11dB
from 1 kHz to 6.5 kHz based on the simulated results. The purpose of extending the bandwidth of the flextensional
transducer could achieve.
The study of low frequency, small size transducer was an important aspect for the development of the underwater
acoustic transducer. The Class IV flextensional transducer was a typical low frequency, high-power and small size
transducer. For decreasing its resonant frequency in the case of small size, a flextensional transducer with slotted shell
was analyzed using finite element software ANSYS. A comparison between the flextensioanl transducer with slotted
shell and the Class IV flextensional transducer was made. The maximum size of the shell is 200mm. The transmitting
voltage response of the transducer reaches to 131dB with resonant frequency 600Hz in water. The transducer could
radiate at low frequency with small size of the shell.