Abstract
Accuracy in Q-factor measurements for low-lossmechanical systems is limited by noise in long-term amplitudering-down curves. In particular, seismic noise can couplestrongly to a pendulum. By correlating the appropriate component of seismic data with a ring-down curve, we show thatit is possible to remove the variation in amplitude due toseismic excitation. Removal of the seismic signal allows afaster and more accurate determination of pendulum Q-factors.In addition, the technique could allow the Q-factor to bedetermined without large-amplitude excitation.
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