Lockheed Martin Corporation

Gordon Briggs

Robert James Howard

John Walter Rapp

Nicholas John Nagurny

Jared D Gilbert

Matthew Herbek

Eliot Goldstein

Austin Lu

Jennifer Dolson

Ariel Brown

John Gornowich

Nicole Anderson

An embodiment of a device for generating an acoustic signal in a fluid includes an engine operable to repeat a thermodynamic process to vibrate a membrane of the engine to generate an acoustic signal having more than one period. The thermodynamic process includes heating mass inside a chamber of an engine to generate pressure inside the chamber; in response to generating the pressure, moving in a first direction a portion of a membrane of the engine; removing mass from inside the chamber to decrease the pressure inside the chamber; and in response to decreasing the pressure inside the chamber, moving the membrane portion in a second direction. In an embodiment, because the engine repeats the thermodynamic process, the engine can generate and sustain an acoustic signal for a significant amount of time.

Engine and technique for generating an acoustic signal

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Arlington, VA, United States of America

Gordon Briggs