Abstract
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 language | English (US) |
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Pages (from-to) | 1528-1531 |
Number of pages | 4 |
Journal | Journal of the Acoustical Society of America |
Volume | 102 |
Issue number | 3 |
DOIs | |
State | Published - 1997 |
ASJC Scopus subject areas
- Arts and Humanities (miscellaneous)
- Acoustics and Ultrasonics