Abstract: The present invention relates to a sound emitter device (1) that is immersible or semi-immersible in a liquid, the device comprising both a rigid hollow body (3) having at least one opening one of its ends (31, 32) and arranged to be immersed at least in part in the liquid, in such a manner that the main axis (4) passing through the opening of the hollow body (3) is substantially vertical, and also at least one electrodynamic loudspeaker (5, 51, 52) comprising at least one diaphragm (6, 61, 62), at least one magnet, at least one moving coil (7, 71, 72). The at least one loudspeaker (5, 51, 52) is fastened inside the hollow body (3) in the proximity of at least one immersed opening of the hollow body (3), the device (1) and its hollow body (3) being arranged so that, when the device (1) is at least semi-immersed, the diaphragm (6, 61, 62) of the at least one loudspeaker (5, 51, 52) is in contact with the liquid on at least one of its sides and closes the immersed opening (32) of the hollow body (3).

Abstract: The present invention relates to a sound emitter device (1) that is immersible or semi-immersible in a liquid, the device comprising both a rigid hollow body (3) having at least one opening one of its ends (31, 32) and arranged to be immersed at least in part in the liquid, in such a manner that the main axis (4) passing through the opening of the hollow body (3) is substantially vertical, and also at least one electrodynamic loudspeaker (5, 51, 52) comprising at least one diaphragm (6, 61, 62), at least one magnet, at least one moving coil (7, 71, 72). The at least one loudspeaker (5, 51, 52) is fastened inside the hollow body (3) in the proximity of at least one immersed opening of the hollow body (3), the device (1) and its hollow body (3) being arranged so that, when the device (1) is at least semi-immersed, the diaphragm (6, 61, 62) of the at least one loudspeaker (5, 51, 52) is in contact with the liquid on at least one of its sides and closes the immersed opening (32) of the hollow body (3).

Abstract: A sound transmitter includes at least a vibrating membrane mounted on the wall of an enclosure so that one surface of the speaker membrane radiates in the enclosure, the enclosure being provided with a vent forming a conduit between an outlet inside the enclosure and an outlet outside the enclosure. The vent comprises aerodynamic turbulence attenuating elements at least at one of the outlets, the turbulence resulting from an air stream caused by the large amplitude displacements of the membrane. The invention also concerns a sound transmitter wherein air moves in a conduit (33) extending from the membrane to an outlet (35) of the conduit (33) on the outside. The invention further concerns a speaker whereof the members have an aerodynamic shape.

Abstract: The invention concerns a sound transmitter comprising at least a vibrating membrane mounted on the wall of an enclosure so that one surface of the speaker membrane radiates in the enclosure, the enclosure being provided with a vent forming a conduit between an outlet inside the enclosure and an outlet outside the enclosure. The invention is characterised in that the vent comprises aerodynamic turbulence attenuating means at least at one of the outlets, said turbulence resulting from an air stream caused by the large amplitude displacements of the membrane. The invention also concerns a sound transmitter wherein air moves in a conduit (33) extending from the membrane to an outlet (35) of the conduit (33) on the outside. The invention further concerns a speaker whereof the members have an aerodynamic shape.