Diffuse fields in ultrasonics and seismology

Richard L. Weaver, Oleg I. Lobkis

Research output: Contribution to journalReview article

Abstract

We review the history of diffuse ultrasonic waves in solids with emphasis on recent developments in field-field correlations and their identification with Green's function. The basic principles appear to be well understood now, and the identity between these two waveforms has been proven under a variety of assumed conditions that guarantee a diffuse field. Promise for practical passive imaging is good; nevertheless, measurements sometimes fail to fully agree with theory. We ascribe this in some cases to incomplete convergence - insufficient amounts of data have been processed. In other cases, it is probably because of a lack of perfect diffuseness; ambient nonmultiply scattered fields are often not equipartitioned and imperfectly diffuse.

Original languageEnglish (US)
Pages (from-to)SI5-SI9
JournalGeophysics
Volume71
Issue number4
DOIs
StatePublished - 2006

Keywords

  • Seismology
  • Ultrasonics

ASJC Scopus subject areas

  • Geochemistry and Petrology

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