Enhanced backscattering and modal echo of reverberant elastic waves

Richard L. Weaver, Oleg I. Lobkis

Research output: Contribution to journalArticlepeer-review


We report experimental evidence for coherent backscattering of waves in a three-dimensional elastic body. Ultrasonic spectral energy density consequent to a transient excitation is measured as a function of time and of distance from the source. In accord with the predictions of random matrix theory, an enhancement is found near the source by a weak localization factor of 2 at early times, but a factor of 3 at late times. The effect appears to be independent of absorption.

Original languageEnglish (US)
Pages (from-to)4942-4945
Number of pages4
JournalPhysical review letters
Issue number21
StatePublished - 2000

ASJC Scopus subject areas

  • General Physics and Astronomy


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