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Comparison of the S/N ratios of low-frequency hydrophones and geophones as a function of ocean depth

HAWAII INSTITUTE OF GEOPHYSICS UNIVERSITY OF HAWAII, 2525 CORREA ROAD, HONOLULU, HAWAII 96822

Abstract

The pressures and particle velocities of sediment-borne signals were recorded over a 9-day period by an array of telemetered ocean-bottom seismometers positioned on the continental margin off Nova Scotia. The telemetered ocean-bottom seismometer packages, which appear to have been very well coupled to the sediments, contained three orthogonal geophones and a hydrophone. The bandwidth of all sensors was 1 to 30 Hz. Analysis of the refraction data shows that the vertical geophones have the best S/N ratio for the sediment-borne signals at all recording depths (67, 140, and 1301 m) and nearly all ranges. The S/N ratio increases with increasing sensor depth for equivalent weather conditions. Stoneley and Love waves detected on the Scotian shelf (67-m depth) are efficient modes for the propagation of noise.

This article has been cited by other articles:

				T. M. BROCHER and B. T. IWATAKE Sources of low-frequency ambient seafloor noise on a continental shelf Bulletin of the Seismological Society of America, August 1, 1982; 72(4): 1129 - 1142. [Abstract] [PDF]