Abstract
In response to recent demand for greater miniaturization of underwater sound pro-jectors, the authors have applied both finite element method (FEM) analysis and equiv-alent circuit analysis to the design of a disk bender projector with dual radiation surface which utilizes two piezoelectric ceramic disks operating in an unstiffened mode. The projector fabricated from this design is miniature and light-weight (200 mm in diameter, 32 mm thick, and 4.27 kg in weight). The resonant frequencies of the projector in air and water are, respectively, 1315 Hz and 970 Hz, and experimental maximum trans-mitting voltage sensitivity is 132.2 dB re 1 μPa/V at 1 meter. The sound pressure level is 192.0 dB re 1 μPa at 1 meter when an input voltage of 143.7 Vrms/mm is applied to the piezoelectric ceramic disks.
