Absorptive sonar baffle

Details Absorptive sonar baffle Absorptive sonar baffle

1981-11-16

1984-05-22

Tudor, Harold J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367153, 367167, 181151, 181264, H04R 1700

Patent

active

044505442

ABSTRACT:
The acoustical energy absorbing baffle has a pair of restricted orifice screens rigidly secured in parallel, spaced relation by a lattice stiffener. The screen-stiffener assembly is immersed in a viscous fluid contained within a tank sealed with an elastic diaphragm. Incident acoustical energy is transmitted through the diaphragm and translated into energy absorbing motion of the fluid through the restrictive screens. A compliant mass is acoustically coupled to the fluid to augment fluid particle velocity through the screens and to further absorb energy.

REFERENCES:
patent: 2545101 (1951-03-01), Meunier
patent: 2571899 (1951-10-01), Kroft et al.
patent: 3185868 (1965-05-01), Coyle et al.
patent: 3263208 (1966-07-01), Douglois et al.
patent: 3539980 (1970-10-01), Massa
patent: 3781779 (1973-12-01), Tallman
patent: 3907062 (1975-09-01), Brigham et al.
patent: 4140992 (1979-02-01), Wardle

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