Array plate apparatus having tunable isolation characteristics

Details Array plate apparatus having tunable isolation characteristics Array plate apparatus having tunable isolation characteristics

2007-06-26

2009-11-24

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Sonar counter-measures

Reexamination Certificate

active

07623409

ABSTRACT:
An apparatus having an array plate and an isolation section joined to the perimetrical edge of the plate. The isolation section has a plurality of isolation layers and a plurality of intermediate layers alternately arranged wherein an intermediate layer is positioned between consecutive isolation layers. An innermost isolation layer is joined to the perimetrical edge of the array plate and an outermost isolation layer is adapted to be joined to a hull structure of an underwater vehicle. Each isolation layer is made from energy absorbing material and each intermediate layer is made from generally rigid material. The isolation section substantially reduces vehicle self-noise from traveling to the array plate. Interchangeable depth stop members having various geometries are used to adjust the stiffness of the isolation section so as to maximize the isolation characteristics of the isolation section at particular water depths at which the underwater vehicle operates.

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