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Article
Analyzing the Coda from Correlating Scattered Surface Waves
Journal of the Acoustical Society of America (2012)
  • Dylan Mikesell, Boise State University
  • Kasper van Wijk, Boise State University
  • Thomas E. Blum, Boise State University
  • Roel Snieder, Colorado School of Mines
  • Haruo Sato
Abstract

The accuracy of scattered Rayleigh waves estimated using an interferometric method is investigated. Summing the cross correlations of the wave fields measured all around the scatterers yields the Green’s function between two excitation points. This accounts for the direct wave and the scattered field (coda). The correlations themselves provide insights into the location of the scatterers, as well as which scatterer is responsible for particular parts of the coda. Furthermore, these measurements confirm a constant-time arrival in the correlations, not part of the Green’s function, but which has previously been derived as a result of the generalized optical theorem.

Keywords
  • acoustic field,
  • acoustic wave interferometry,
  • acoustic wave scattering,
  • Green's function methods
Publication Date
March 1, 2012
Citation Information
Dylan Mikesell, Kasper van Wijk, Thomas E. Blum, Roel Snieder, et al.. "Analyzing the Coda from Correlating Scattered Surface Waves" Journal of the Acoustical Society of America Vol. 131 Iss. 3 (2012)
Available at: http://works.bepress.com/kasper_van_wijk/27/