A method of transmitting very low frequency high power acoustic waves, and corresponding transducers.

摘要

The subject of the present invention is a method for transmitting acoustic waves at very low frequencies with high power, and corresponding transducers. The technical field of the invention is that of the production of electro-acoustic transducers for the emission of acoustic waves immersed in a liquid. BR/ A transducer according to the invention comprises one or more electro-acoustic motors (1) placed in a same plane, inside or in a peripheral ring of a flexible envelope (5), which they are secured by to at least one of their ends by any assembly device (2) and to which they transmit their vibrations, which flexible envelope is in contact with said liquid (4) constituting the emission surface of the acoustic waves, and of a shape such as that the amplitude of these vibrations is amplified in a very low frequency range; said envelope (5) comprises at least any opening (6) allowing said liquid (4) to penetrate the entire cavity (7) defined by said inner envelope (5); a baffle (15) made of cellular material resistant to immersion pressure occupies most of the volume of the cavity (7), whose external surface is at a constant distance (14) from that of the envelope (5), and is integral with the connecting device (2, 8) of the acoustic motors (1). / P