Geophone with depth sensitive spikes

Details Geophone with depth sensitive spikes Geophone with depth sensitive spikes

1991-01-17

1992-06-23

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Receivers

181122, 181401, H04R 1500

Patent

active

051249561

ABSTRACT:
A geophone configuration is disclosed that includes an elongated extension or spike that couples with the soil in the hole made by the spike in the region near the end of the spike without hard or firm coupling with the soil above that region. A bow spring or drill bit larger in diameter than the diameter of the spike can be used for achieving predominant contact for the coupled region compared to soil opposite the remainder of the spike. Alternately, a weighted tip can be employed to achieve relative superior coupling by weight compared with the less heavy region of the spike above such weighted tip.

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"Geophone Ground Coupling", C. E. Krohn, Geophysics, Apr. 1985.
"Geophone Differencing to Attenuate Horizontally Propagating Noise", R. W. Knapp, Sep. 1986.

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