Acoustic baffle for high-pressure service, modular design

Details Acoustic baffle for high-pressure service, modular design Acoustic baffle for high-pressure service, modular design

1981-01-27

1983-08-16

Tudor, Harold J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

181292, 310337, 367151, 367152, 367153, 367162, 367173, 367176, H04R 1700

Patent

active

043995268

ABSTRACT:
An acoustic array for use at high hydrostatic pressures comprises an acouc isolation baffle positioned adjacent to the hull; an intermediate acoustic conditioning module supported over the isolation baffle; and an outer layer containing a plurality of hydrophone units. The acoustic isolation baffle comprises alternating layers of rigid and compliant materials bonded together in sandwich fashion, wherein the compliant layer is provided with a regular pattern of air cells. In adjoining compliant layers the pattern of air cells is translated relative to each other so that the load bearing walls of one compliant layer overlap the open cell regions of the adjacent compliant layer with only a rigid layer disposed therebetween. The acoustic conditioning module comprises spaced coverplates with spacer elements extending therebetween to form a plurality of chambers which contain viscoelastic damping elements bonded to the outer coverplate.

REFERENCES:
patent: 2754925 (1956-07-01), Burke
patent: 2768364 (1956-10-01), Camp
patent: 3087574 (1963-04-01), Watter
patent: 3177970 (1965-04-01), Boschi
patent: 3424270 (1969-01-01), Hartman et al.
patent: 3601228 (1971-08-01), Nashif
patent: 3737004 (1973-06-01), Higgs
patent: 3907062 (1975-09-01), Brigham
patent: 4177876 (1979-12-01), Pujolle

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