Matched array plate

Means for equalizing the internal pressure in an underwater tran

Mechanical spacer for towed acoustic array

Mechanoacoustic transducer for use in transmitting high acoustic

Membrane hydrophone

Membrane hydrophone having inner and outer membranes

Membrane-supported electronics for a hydrophone

Metal-electroactive ceramic composite actuators

Method and apparatus for a phased array transducer

Method and apparatus for attracting fish to a selected location

Method and apparatus for beam steering and bessel shading of con

Method and apparatus for controlling scanning of mosaic...

Method and apparatus for controlling the acoustic output of...

Method and apparatus for controlling the acoustic output of...

Method and apparatus for converting an air gun into a hydro gun

Method and apparatus for converting tube waves to body waves for

Method and apparatus for damping an ultrasonic transducer...

Method and apparatus for detecting hidden features disposed...

Method and apparatus for detecting submarines

Method and apparatus for emitting high power acoustic waves usin