NASA NTRS · 19730000420
Ultrasonic calibration device
Abstract
Device is an instrument for producing known changes in both acoustic absorption and phase velocity. Calibration signal arises from actual change of acoustic parameters, not from electrical simulation. Instrument is able to simulate changes in sensitivity enhancement achieved by use of ultrasonic resonators, which cannot be achieved using electrical calibration techniques.
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Heyman, J. S., Miller, J. G.. 1973-12-01. Ultrasonic calibration device. https://ntrs.nasa.gov/citations/19730000420
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