Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1978-07-03
1980-05-20
Birmiel, Howard A.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 41, 367 49, 367137, 181119, 343 172PC, G01V 122
Patent
active
042042780
ABSTRACT:
Quasi periodic pulse trains are generated and swept in repetition frequency over an octave. Spectral harmonics of the pulse trains which prevent the trains from having a constant or "flat" power spectrum over a frequency range much greater than an octave are reduced or eliminated by adjusting the shape of the pulses in the trains. By means of selecting the timing of the pulses, other harmonics are reduced or preferentially augmented. The spectral energy of the signals which are generated during a transmission interval is of the type which possesses an autocorrelation function with a narrow main lobe and low side lobe levels which is especially suitable for echo location purposes such as in geophysical exploration in which seismograms are constructed by cross correlation of the signals which are transmitted with those which are received from the geological reflection surfaces.
REFERENCES:
patent: 3618095 (1971-11-01), Darlington
patent: 3757331 (1973-09-01), Moulton
patent: 3905033 (1975-09-01), Moore et al.
patent: 4004267 (1977-01-01), Mayne
patent: 4069470 (1978-01-01), Cunningham et al.
patent: 4147228 (1979-04-01), Bouyoucos
patent: 4156875 (1979-05-01), Debuisser
Birmiel Howard A.
Hydroacoustics Inc.
Lukacher Martin
LandOfFree
Methods and apparatus for the generation and transmission of sig does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for the generation and transmission of sig, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for the generation and transmission of sig will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-452731