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AssigneeL'Etat Francais represente par le Delegue General pour l'Armement
InventorsYves Y. Ripoll, Jacky J. Garcin
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The invention is directed to the class of submersible electro-acoustic transducers such as double "Tonpilz" transducers, wherein it is desirable to reduce the resonant frequency of the transducers while maintaining a given output power emitted by the transducers. The transducer according to the invention includes at least one horn solid with the end of a motor pillar, a hollow rigid box surrounding the horn and delimiting with the horn a cavity. The cavity communicates via a port with an external fluid, and has determined dimensions and external volume. The transducer further includes a passive radiator made of a material denser than the external fluid. The radiator obturates the port and hangs at a periphery of the port by an elastic material.
A process for emitting acoustic waves into an external fluid at low frequency from a transducer comprising at least one horn solid with the end of a motor pillar, a hollow rigid box surrounding the horn and delimiting with the at least one horn at least one cavity, the at least one cavity communicating by at least one port with the external fluid and having determined dimensions and external volume, the transducer transmitting waves in a given frequency range and with a given maximum electro-acoustic power consumption, wherein:
A device to reduce the resonant frequency of cavities of a sumbersible transducer comprising at least one horn solid with the end of a motor pillar, a hollow rigid box surrounding the horn and delimiting with the horn at least one internal cavity, the cavity communicating by at least one port with an external fluid, the internal cavity having determined dimensions and external volume, the transducer transmitting waves in a given frequency range with a given power and including a passive radiator made of a material denser than the external fluid, the passive radiator obturating the at least one port and being hung at a periphery of an edge of said at least one port by an elastic material.
Dependencies are inferred from the claim text.