Underwater acoustic pressure release baffle for depths to 2000 feet

摘要

A neutrally buoyant, wide frequency range underwater acoustic baffle suitable for extended depth operation comprising a laminated structure including a rigid inner separator sheet having a plurality of uniformly distributed cavities sandwiched between two flexible outer cover sheets and surrounded along its edges with a waterproof seal to completely encapsulate the separator sheet within the cover sheets and waterproof seal. Entrapped air within the air cavities offers a low effective acoustic impedance compared to water, and the rigid inner separator sheet maintains constant separation between the flexible cover sheets, and therefore low acoustic impedance, even under high hydrostatic pressures.