Device for emitting an acoustic wave

A device for emitting an acoustic wave comprising:

• a flared structural piece bearing at its base an electromechanical transducer, the perimeter of its flared end defining an output surface;
• and
• a single-piece mechanical-acoustic coupler, the coupler being a solid piece and comprising:
• a first portion for mounting on the transducer,
• a second portion extending from the first portion up to the level of the output surface, the coupler being suspended on the structural piece at the level of the second portion and the second portion having a cross-sectional area at the level of the output surface which is strictly greater than its cross-sectional area at the level of the first portion, and
• a third portion extending from the second portion, where the third portion has a cross-sectional area at the interface with the second portion which is smaller than the output surface, the third portion comprising a cross section at an emitting surface of greater area than the output surface,
• wherein when said emission device is juxtaposed together with a plurality of emission devices for emitting an acoustic wave, a continuous emitting surface is formed between all of the emitting surfaces of the juxtaposed emission devices.