USA as Represented by Secretary of the Navy

David B Larrabee

John W Henry, Iv

Michael Jason Grady

William F Flickinger

Jeffrey S Goldring

Kevin E Crouchley

Debra M Kenney

An acoustic projector device having a piston exposed to pressure balanced air and water in an acoustically ideal position thereof within a piston chamber enclosing sleeve disposed in an outer housing to which deaerating water is selectively supplied in surrounding relation to the piston chamber sleeve while in communication with one side of the piston through axial slots in the sleeve uncovered by displacement of the piston from said acoustically ideal position.

Fluidborne sound projector with sweep cleaning facilities

A fluidborne projector of sound derived from an electro-mechanical noise source translates acoustical energy through a piston subjected to balanced pressures of gas and liquid to enabled dynamic displacement thereof. Such displacement of the piston to a static position is regulated by controlled pressurization of gas, mechanically limited to prevent damage from changing pressures exerted on the piston.

Fluidborne sound projector

Growing community of inventors

Annapolis, MD, United States of America

David B Larrabee