Absorbent passive acoustic antenna

Details Absorbent passive acoustic antenna Absorbent passive acoustic antenna

1995-05-25

1997-02-04

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367162, H04R 1700

Patent

active

056006098

ABSTRACT:
An absorbent passive acoustic antenna, designed to be attached to the hull of a ship, is made in the form of a stack of layers of polyurethane having different types of composition to obtain absorbent and/or reflective characteristics so as to minimize the parasitic signals received by the hydrophones and achieve the maximum absorption of the signals coming from the active sonars external to the vessel on which these antennas are placed.

REFERENCES:
patent: 3647022 (1972-03-01), Meyer et al.
patent: 3894169 (1975-07-01), Miller
patent: 4390976 (1983-06-01), Eynck
patent: 4571520 (1986-02-01), Saito et al.
patent: 4628490 (1986-12-01), Kramer et al.
patent: 4982385 (1991-01-01), Eynck
patent: 5420825 (1995-05-01), Fischer et al.

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