HYDROACOUSTIC EMITTER Russian patent published in 1998 - IPC

FIELD: hydroacoustic low- frequency wide-band rod piezoelectric emitters. SUBSTANCE: device has rod piezoelectric element 6, which is armored by tie 5, front cover plate 1 and hinder cover plate 2, heavy cover plate 4 and flexible cover plate 3 by front cover plate. Flexible passive cover plate 3 is integral with front cover plate 1 and is designed as cylinder which bottom is rigidly connected to rod piezoelectric element 6. Heavy passive cover plate 4 is located inside cylinder spaced with respect to its walls and front cover plate and is connected to cylinder bottom. Armor tie 5 is rigidly connected to heavy passive cover plate 4. EFFECT: decreased length, increased reliability, increased variance in frequency response, tuning frequency response without alternation of external size of emitter during manufacturing. 2 dwg