US Patent 7536913 Rigidly mounted underwater acoustic inertial vector sensor

An underwater acoustic sensor is designed for attachment to a rigid or semi-rigid mounting structure. The sensor includes an outer casing and a secondary casing spaced therefrom. A compliance layer is disposed between the inner surface of the outer casing and the outer surface of the secondary casing. An inner sensor support is designed to attach to the mounting structure and is spaced from the inner surface of the secondary casing. A plurality of sensor elements are disposed between and interconnect the inner surface of the secondary casing and the sensor support.