A Novel Technique to Measure the Group Velocity of Sound in Dispersive Media

Z. Zhao, S. D. Aden Walla, J. B. Ketterson, Bimal K. Sarma

Research output: Contribution to journalArticle

Abstract

A new technique is proposed to measure the group velocity of sound by a frequency modulated (FM) continuous wave (CW) technique. Detailed calculations presented yield the results that Vx = (Awm/A<t>)d, where Vx, Aa>w, A<^» and d are, respectively, the group velocity, change of modulation frequency, phase change of the received signal detected by a biphase lock-in amplifier, and the distance travelled by the sound. The new approach has the advantage of high resolution compared to the conventional time-of-flight measurement technique.

Original languageEnglish (US)
Pages (from-to)481-484
Number of pages4
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume36
Issue number5
DOIs
StatePublished - Sep 1989

ASJC Scopus subject areas

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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