Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1982-09-30
1986-01-21
Cangialosi, Salvatore
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
73597, 367 75, G01V 128
Patent
active
045660840
ABSTRACT:
Acoustic energy is propagated through earth material between an electro-acoustic generator and a receiver which converts the received acoustic energy into electrical signals. A closed loop is formed by a variable gain amplifier system connected between the receiver and the generator. The gain of the amplifier system is increased until sustained oscillations are produced in the closed loop. The frequency of the oscillations is measured as an indication of the acoustic propagation velocity through the earth material. The amplifier gain is measured as an indication of the acoustic attenuation through the earth materials. The method is also applicable to the non-destructive testing of structural materials, such as steel, aluminum and concrete.
REFERENCES:
patent: 2231243 (1941-02-01), Beers
patent: 2723387 (1955-11-01), Slavin, III
patent: 2754492 (1956-07-01), Parker
patent: 3311875 (1967-03-01), Geyer et al.
patent: 3330375 (1967-07-01), White
patent: 3938072 (1976-02-01), Baird et al.
patent: 4105993 (1978-08-01), Grassy et al.
patent: 4128011 (1978-12-01), Savage
Cangialosi Salvatore
Clouse, Jr. Clifton E.
Gaither Roger S.
Hightower Judson R.
Kaiser K. R.
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