Measurements of Ultrasonic Velocities Using a Digital Averaging Technique
作者:
Lewis L. Lacy,
A. C. Daniel,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1972)
卷期:
Volume 52,
issue 1B
页码: 189-195
ISSN:0001-4966
年代: 1972
DOI:10.1121/1.1913077
出版商: Acoustical Society of America
数据来源: AIP
摘要:
A new pulse‐echo technique using real‐time digital averaging is described for measuring the phase velocity in solids up to 50 MHz. The technique can measure the transit time between any two echoes to an absolute accuracy of 0.1 nsec and measure small changes in transit time to a sensitivity of 20 psec. Experimental examples are given based upon ultrasonic velocity measurements in a single crystal superconductor.
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