公开(公告)号：US09906857B2

公开(公告)日：2018-02-27

申请号：US14689442

申请日：2015-04-17

Applicant: LOCKHEED MARTIN CORPORATION

Inventor： Russell M. Sylvia ,  Patrick J. Kelly ,  Martin C. Lewis

IPC: H04R1/44 ,  G10K9/13

CPC classification number: H04R1/44 ,  G10K9/13

Abstract: An underwater acoustic projector for projecting acoustic energy through water is described. The acoustic projector includes a housing defining an internal cavity, a plurality of apertures in the housing that place the internal cavity in fluid communication with an external environment, an acoustic baffle disposed in the internal cavity at a first end that fluidly seals the first end of the internal cavity from the external environment, and a projector face that is disposed in the internal cavity at a second end of the internal cavity. The projector face includes a movable piston disposed between outer and inner diaphragms. A magnet is fixed within the internal cavity between the acoustic baffle and the projector face, and a moving coil is connected to the piston and arranged relative to the magnet so as to be driven by the magnet thereby driving the piston.