Underwater broadband acoustic transducer
AssigneeThales Underwater Systems S.A.S.
InventorsYves Lagier, Vito Suppa, Gérard Roux, Gilles Lubrano
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Abstract
An underwater acoustic transducer configured to emit a low-frequency broadband acoustic signal. The underwater acoustic transducer includes a cap in the form of a cylinder closed on one side and open on the other side. A piezoelectric plate operating in flexion is fixed on the base of the cylinder outside the cylinder. The inside cavity defined by the cylinder is open freely toward the outside medium in which the acoustic waves are to be emitted. For identical dimensions, the underwater acoustic transducer makes it possible to decrease a central frequency of emission and to increase bandwidth.
Claims8
Broadband underwater acoustic transducer, comprising:
- at least one piezoelectric plate operating in flexion;
- a baseboard having a first predetermined mode of resonance, said baseboard having a variable thickness;
- and
- a cylindrical cap closed at a first end by the baseboard and open at a second end to form a first cavity, said cap having a second predetermined mode of resonance different than said first predetermined mode of resonance,
- wherein the at least one piezoelectric plate is fixed on an outside face of the baseboard and the first cavity is open freely toward an outside medium in which the cap is immersed.
Dependencies are inferred from the claim text.