Narrow band acoustic source

Details Narrow band acoustic source Narrow band acoustic source

1992-09-23

1994-05-03

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367158, 367159, 367162, 367176, 310337, 181106, H04R 1500

Patent

active

H00013080

ABSTRACT:
A seismic source for downhole use is disclosed which is formed by an outer tubular member having weighted ends which carries within a coaxially mounted tubularly shaped piezoelectric element. The piezoelectric element is cyclically driven to produce a standing wave having a frequency in the range of 0.25 to 5 kHz and a narrow bandwidth in the range of 5-50 Hz.

REFERENCES:
patent: 4525645 (1985-06-01), Shirley et al.
patent: 4671379 (1987-06-01), Kennedy et al.
patent: 4682308 (1987-07-01), Chung
patent: 4821244 (1989-04-01), Wood
patent: 4855964 (1989-08-01), Fanning et al.
patent: 5030873 (1991-07-01), Owen
patent: 5081391 (1992-01-01), Owen

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