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

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE