Comment on chirp excitation of ultrasonic probes and algorithm forfiltering transit times

摘要

Folkestad and Mylvaganam use a chirp technique to resolve annambiguity in time-of-flight measurements. An alternative is to triggernan oscilloscope on one cycle of the initial tone burst, then vary thenfrequency. In the delayed burst, the correct cycle for time-of-flightnmeasurements remains stationary