Seismic pulse generation

Details Seismic pulse generation Seismic pulse generation

1992-09-10

1993-12-14

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367174, 367171, 367146, 181119, 181113, 181106, G01V 1137

Patent

active

052709850

ABSTRACT:
An acoustic wave energy generator comprises a body having an internal gas-pressurisable first chamber 1 adjoining a second chamber 2 into which a liquid is introduced to cover a vibratable means 4 which may be a flexible diaphragm and is mounted on the second chamber so as to close an associated opening 5 in the second chamber. After the first chamber 1 is pressurised with a first gas a common closed opening between the chambers is opened to cause communication between the chambers 1,2 to permit a shock wave emanating from the first chamber to impinge on the liquid. As a result, the vibratable means 4 is caused to vibrate so as to produce acoustic wave energy in response to the impingement of the shock wave on the liquid. By using different liquids and/or different heights of liquids in the second chamber the generator may be tuned to provide acoustic wave energy with a relatively narrow chosen frequency range or within a chosen substantially single frequency.

REFERENCES:
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patent: 3310128 (1967-03-01), Chelminski
patent: 3642089 (1972-02-01), Parker et al.
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patent: 3927557 (1975-12-01), Vierti
patent: 4108271 (1978-08-01), Chelminski
patent: 4197522 (1980-04-01), Christoph
patent: 4467766 (1987-05-01), Melvin
patent: 4739859 (1988-04-01), Delano
patent: 5091891 (1992-02-01), Thomas et al.

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