Abstract
Several modifications of a pulse-echo technique for measurements of small changes in ultrasonic phase velocities are described. They are of varying complexity and precision. The best methods are accurate to 2 parts per million at 500 MHz; one of these is automatic and has a response time of the order of 1 sec. The methods are applicable as long as the waveform of one echo can be distinguished from noise.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
