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THEORETISCHE FRAGEN ÜBER BÜNDELUNG VON GEOPHONEN BEI UNTERTAGE‐MESSUNGEN *)
Author(s) -
CELMI?Š AIVARS
Publication year - 1956
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1956.tb01415.x
Subject(s) - geophone , prospecting , sensitivity (control systems) , frequency band , geology , telmatology , vertical seismic profile , economic geology , metamorphic petrology , mineralogy , acoustics , seismology , physics , hydrogeology , telecommunications , engineering , electronic engineering , geotechnical engineering , mining engineering , bandwidth (computing)
A bstract The arrays of multiple geophones used in underground seismic prospecting must satisfy two conditions: 1) In each group only a few geophones can be used. 2) The array must work in a rather wide frequency band. In the present paper the effect of the 3 parameters (geophone spacing, sensitivity and time shift) of a linear array is investigated in order to improve the directional sensitivity of the array. Necessary conditions which are independent of the frequencies are found for the optimum sensitivities of the geophones in a linear array. The optimum values of the parameters mentioned above are calculated for arrays of 2 and 3 geophones and for a frequency band width which may be used in underground seismic prospecting.