Accession Number:
AD0754805
Title:
Measurement of Small Changes in Sound Velocity in the UHF Range,
Descriptive Note:
Corporate Author:
CORNELL UNIV ITHACA N Y MATERIALS SCIENCE CENTER
Personal Author(s):
Report Date:
1969-08-12
Pagination or Media Count:
16.0
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 ppm at 500 MHz one of these is automatic and has a response time of the order of 1 second. The methods are applicable a s long as the waveform of one echo can be distinguished from noise. Author
Descriptors:
Subject Categories:
- Acoustics