Abstract
MOST existing methods of calibrating vibration pick-ups employ some form of extrapolation, that is, the pick-up is calibrated at low frequencies, where the amplitude can be made large, and the result is then extended to higher frequencies. Since it is considered that this method is unsatisfactory, a Michelson interferometer capable of measuring vibratory amplitudes down to 4 × 10−6 in. has been constructed. The upper limit of the calibration frequency is largely determined by the type of vibration pick-up and by the driving vibrator, but the present arrangement can be used up to 10 kc./s.
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DAVIES, S. Calibration of Vibration Pick-ups at High Frequencies using a Michelson Interferometer. Nature 178, 161 (1956). https://doi.org/10.1038/178161a0
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DOI: https://doi.org/10.1038/178161a0
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