Measurements of coupled rayleigh wave propagation in an elastic plate

Boon Wee Ti, William D. O'Brien, John G. Harris

Research output: Contribution to journalArticlepeer-review


At frequencies where the thickness of an elastic plate is more than a wavelength, the propagation of the two lowest Rayleigh-Lamb modes in an elastic plate can be viewed as the propagation of a Rayleigh surface wave over two weakly coupled, surface-wave waveguides. That is, a Rayleigh wave launched on one surface gradually transfers to the other and then back. It does so in a length we call the beatlength. Measurements of the beatlength for brass plates are reported as a function of frequency and thickness. This phenomenon is readily excited and persists over a wide range of thicknesses and frequencies.

Original languageEnglish (US)
Pages (from-to)1528-1531
Number of pages4
JournalJournal of the Acoustical Society of America
Issue number3
StatePublished - 1997

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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