Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America; January 1961; v. 51; no. 1; p. 69-84
© 1961 Seismological Society of America
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Instrument noise in seismometers

C. J. BYRNE

BELL TELEPHONE LABORATORIES, INCORPORATED,, MURRAY HILL, NEW JERSEY

Abstract

Methods are developed to analyze the effects of thermal noise and seismic noise in masking small earth vibrations. The procedure is applied to a simple seismometer, seismometers with electronic and galvanometer amplifiers, and a seismometer with a shunt capacity.

A numerical example is worked out for the Benioff one-second instrument. In the 0.1 second to 10 second band, thermal noise is not limiting.




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