Low-frequency hydrophone and sonar array including such hydropho

Details Low-frequency hydrophone and sonar array including such hydropho Low-frequency hydrophone and sonar array including such hydropho

1990-12-27

1992-09-01

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367155, 310337, H04R 1700

Patent

active

051445972

ABSTRACT:
A low-frequency hydrophone for a sonar array comprises at least a lacunary ceramics element with open porosity saturated by a viscous fluid, on which metal electrodes have been deposited. This hydrophone forms a high-pass filter whose cutoff frequency is adjusted by modulating the area of the electrodes. The present invention may find particular application in towed linear arrays and passive sonars.

REFERENCES:
patent: 3757888 (1973-09-01), Lajier et al.
patent: 4068209 (1978-01-01), Lagier
patent: 4547870 (1985-10-01), Maerfeld et al.
patent: 4712201 (1987-12-01), Lagier
patent: 4751013 (1988-06-01), Kaarmann et al.
patent: 4839872 (1989-06-01), Oragnolati et al.
patent: 4868447 (1989-09-01), Lee et al.
patent: 4876675 (1989-10-01), Ogura et al.
patent: 4883143 (1989-11-01), Lagier
patent: 5003285 (1991-03-01), Geil

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