Tunable marine seismic source

Details Tunable marine seismic source Tunable marine seismic source

1982-11-24

1986-03-25

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367109, 181110, 181120, G01V 138, H04B 1300

Patent

active

045787840

ABSTRACT:
The disclosed device is a marine seismic source which produces a varying FM signal often in the 10-100 Hertz region of the spectrum. The seismic source uses stiff oscillating radiators to create a signal in the water. These radiators are actuated by hydraulic cylinders which are in hydraulic communication with hydraulic or oleo-pneumatic variable devices acting as springs with a variable spring rate. Variation of the spring rate as a function of the frequency permits the device to be tuned for maximum power output.

REFERENCES:
patent: 3246289 (1966-04-01), Mellen
patent: 3384868 (1968-05-01), Brown et al.
patent: 3386525 (1968-06-01), Landrum et al.
patent: 3392369 (1968-07-01), Dickie et al.
patent: 3394775 (1968-07-01), Cole et al.
patent: 3403374 (1968-09-01), Mellen et al.
patent: 3482646 (1969-12-01), Brown et al.
patent: 4014403 (1977-03-01), Mifsud
patent: 4030063 (1977-06-01), Wallen
patent: 4211301 (1980-07-01), Mifsud
patent: 4410062 (1983-10-01), Mifsud
Broding et al., "A High-Power . . . Vibrosius System", 4/71, pp. 90-95, IEEE Trans. Geoscience Elect., vol. GE 9, No. 2.

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