Accession Number : ADD013244

Title :   Underwater Acoustic Pressure Release Baffle for Depths to 2000 Feet.

Descriptive Note : Patent, Filed 20 Nov 85, patented 23 Jun 87,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Henriquez, Theodore A

Report Date : 23 Jun 1987

Pagination or Media Count : 4

Abstract : This patent discloses 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.

Descriptors :   *PATENTS, *BAFFLES, *ACOUSTIC DETECTORS, UNDERWATER ACOUSTICS, DEEP DEPTH, ACOUSTIC REFLECTION, BROADBAND, ACOUSTIC IMPEDANCE, ACOUSTIC ARRAYS, LAMINATES, SANDWICH CONSTRUCTION, BUOYANCY, NEUTRAL, WATERPROOFING

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE