Investigation of Disk Bender Low-Frequency Projector with Dual Radiation Surfaces
Mitsuru Yamamoto, Yoshinori Hama, Hiroshi Shiba, Noriko Watari, Takeshi Inoue Takeshi Inoue · Japanese Journal of Applied Physics · 1993
A low-frequency disk bender projector with dual radiation surfaces was designed on the basis of finite element method (FEM) analysis and equivalent circuit analysis, in order to devise a miniature light weight projector with a high sound pressure level. These analyses suggest that a low-frequency, high-power, miniature and light weight projector can be realized. A trial projector was produced and evaluated. The resonant frequencies for the projector in air and water were 1315 Hz and 970 Hz, respectively. Experimental maximum transmitting voltage sensitivity was 132.2 dB re 1 µPa/V at 1 m.