Dual-section push-pull underwater projector

Details Dual-section push-pull underwater projector Dual-section push-pull underwater projector

1998-12-21

1999-09-07

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

310337, 367141, H04R 1700

Patent

active

059497416

ABSTRACT:
The present invention relates to an underwater acoustic projector compris a housing formed from a rigid material, a fixed plate secured to the housing, a first annular electrostrictive ring and a second annular electrostrictive ring positioned on one side of the fixed plate, and a third annular electrostrictive ring and a fourth annular electrostrictive ring positioned on a second side of the fixed plate. The first and second annular rings are separated by a first moving plate, while the third and fourth annular rings are separated by a second moving plate. The annular rings are formed from lead magnesium niobate or lead magnesium niobate-lead titanate and are wired for dual push-pull operation for reducing the non-linearity of the response of the annular rings.

REFERENCES:
patent: 3725856 (1973-04-01), Chervenak
patent: 4878207 (1989-10-01), Jandera et al.
patent: 4964106 (1990-10-01), Bromfield
patent: 4970706 (1990-11-01), Tocquet et al.
patent: 5345428 (1994-09-01), Arnold et al.
patent: 5359252 (1994-10-01), Swift et al.
patent: 5493165 (1996-02-01), Smith et al.

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