Dictionary:Multiple geophones

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A number of geophones (a group) feeding a single channel; see array (seismic). Used (a) to attenuate ground roll and other undesirable energy that approaches the spread more or less horizontally (see Figure D-15), (b) to improve the signal-to-noise ratio by increasing the sampling and thereby randomizing planting factors, noncoherent energy, etc., and (c) to increase sensitivity.