Acoustically filtered transducer
AssigneeRockwell International Corporation
InventorHarry Nadler
Life of this patent
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Abstract
Disclosed is an acoustic transducer which includes a pressure tight vessel with a window in the vessel which is transparent to acoustic wave energy. A gas is disposed within the vessel, while an electromechanical transducer is located within the vessel at an antinode for a resonant wave of the gas. A port communicates with the interior of the vessel, with a pressure control coupled to the port and to a source of the gas for controlling the pressure of the fluid within the vessel.
Claims6
An acoustic transducer, comprising:
- a pressure tight vessel;
- a compressible fluid disposed within said vessel;
- an electromechanical transducer disposed within said vessel at an antinode of a characteristic resonance pattern for said fluid within said vessel;
- and
- a port communicating with the interior of said vessel for changing the pressure of said fluid within said vessel.
An acoustic transducer, comprising:
- a pressure tight vessel;
- an acoustically transparent window in said vessel;
- a gas disposed within said vessel;
- an electromechanical transducer disposed within said vessel at an antinode for a resonant wave of said gas within said vessel;
- a port communicating with the interior of said vessel;
- and
- a pressure control coupled to said port and to a source of said gas for controlling the pressure of said fluid within said vessel.
A method of converting acoustic wave energy to an electrical signal, comprising the steps of:
- placing an electromechanical transducer within a pressure tight vessel at an antinode of a resonant wave, and
- pressurizing the vessel to achieve a resonance at a predetermined acoustic wave frequency.
Dependencies are inferred from the claim text.