NASA NTRS · 19760000215
Rous system
Abstract
Ultrasonic generator/monitor, appropriate for lab and field use, is used to measure ultrasonic parameters and determine certain physical properties of test region. Reflection-oscillator ultrasonic spectrometer is sensitive, inexpensive, has no duty-cycle effects, is simple in construction and use, and for resonance measurements, takes advantage of sensitivity enhancement, and has high frequency stability.
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Heyman, J. S.. 1976-08-01. Rous system. https://ntrs.nasa.gov/citations/19760000215
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