Abstract: A marine seismic source for generating acoustic source energy from electrical power. A slotted housing has an exterior surface engaged with an electrically activated transducer such as a piezoelectric transducer. One or more piezoelectric components can be adhered or otherwise attached to the exterior surface of the housing. A case can cover all or part of the piezoelectric components, and the case can be waterproof to prevent contact between the transducer and the water. The case can be integrated with the slotted housing to form a composite structure, or a cavity, for containing a transducer such as piezoelectric components.

Abstract: Ocean bottom seismic cables are subject to rolling motions due to seismic wave fields and current action which cause poor receiver ground-coupling and signal distortion, particularly along the cross-line and vertical axes. Two multi-axial receivers are mounted on opposite sides of the cable in a single cluster. When the cable rolls, the axial response of one receiver of the cluster cancels the axial response of the other receiver of that cluster.