Acoustics – Geophysical or subsurface exploration – Seismic wave detection
Patent
1994-06-07
1996-08-13
Eldred, J. Woodrow
Acoustics
Geophysical or subsurface exploration
Seismic wave detection
367 49, 367153, 367155, 181112, G01V 116
Patent
active
055458580
ABSTRACT:
A method for determining a unique signal representing the earth's response between a transmitter and receivers when conducting a seismic survey involves the steps of receiving a seismic signal set that comprises a plurality of different output frequency signals having known amplitude and phase characteristics, selectively combining the different output frequency signals to form the unique signal, and recording values of amplitude, phase, and frequency of the unigue signal. A method of conducting a modulated seismic survey involves the steps of providing seismic sensors capable of receiving a modulated seismic signal comprised of different frequency signals, transmitting modulated seismic energy information into the earth, and recording indications of reflected and refracted seismic waves sensed by the seismic sensors in response to transmission of the modulated seismic energy information into the earth.
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patent: 2757356 (1956-07-01), Haggerty
patent: 4458339 (1984-07-01), Wason
patent: 4875166 (1989-10-01), Carroll et al.
patent: 5077697 (1991-12-01), Chang
patent: 5231611 (1993-07-01), Laznicka, Jr.
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Eldred J. Woodrow
Hein William E.
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