LOW FREQUENCY ELECTRO-ACOUSTIC TRANSDUCER AND METHOD FOR GENERATING ACOUSTIC WAVES.

摘要

The present invention relates to a submersible electro-acoustic transducer in an immersion fluid for submarine acoustic communication or underwater acoustic tomography, said transducer comprising two horns, a counterweight, two electro-acoustic motors, placed on the other hand, said motors being aligned along an axis of symmetry, the opposite ends of said motors being respectively connected to a horn, the assembly consisting of said electro-acoustic motors, said counterweight and said horns being capable of generating a longitudinal electro-acoustic resonance mode. According to the invention, said transducer comprises a rigid and hollow cylindrical piece extending around said counterweight, said cylindrical piece having an axis coincident with the axis of symmetry of the transducer, the inside of said cylindrical piece forming a fluid cavity capable of to be filled by said immersion fluid, said electro-acoustic motors and said cylindrical piece being dimensioned so that said fluid cavity forms an acoustic coupling between said longitudinal electro-acoustic resonance mode of said transducer and a circumferential resonance mode of said piece cylindrical when said fluid cavity is filled with said immersion fluid.