Underwater acoustic pressure release baffle for depths to 2000 f

Details Underwater acoustic pressure release baffle for depths to 2000 f Underwater acoustic pressure release baffle for depths to 2000 f

1985-11-20

1987-06-23

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Sound absorbing panels

181175, 181288, 181290, 181294, E04B 182

Patent

active

046745955

ABSTRACT:
A neutrally buoyant, wide frequency range underwater acoustic baffle suite 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.

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patent: 3901352 (1975-08-01), Cluzel
patent: 3963094 (1976-06-01), Nowikas
patent: 4090171 (1978-05-01), Bulzer et al.
patent: 4301890 (1981-11-01), Zalas
patent: 4390976 (1983-06-01), Eynck
patent: 4399526 (1983-08-01), Eynck
patent: 4487794 (1984-12-01), Brown et al.

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