Marine seismic streamer employing variable aperture flow through

Marine seismic streamer having acoustic isolation between...

Marine streamer cable

Marine streamer for use in seismic surveys

Marsh case

Marsh case for a geophone

Matched array plate

Matching layer for front acoustic impedance matching of clinical

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 non-oil-filled towed array with a...

Method and apparatus for a non-oil-filled towed array with a...

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