LOCADIFF: Locating a weak change with diffuse ultrasound

  • Planès T
  • Larose E
  • Rossetto V
 et al. 
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This article presents an imaging technique to locate a weak perturbation in a multiple scattering environment. We focus on concrete probed by ultrasound. We derive a formula to predict the spatiotemporal decorrelation of diffuse coda waves induced by an extra scatterer. We solve the inverse problem with a maximum likelihood approach. Using elastic waves in the 50-400 kHz frequency band, we recover the position of millimetric holes drilled in a concrete sample with a precision of a few centimeters.

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  • Thomas Planès

  • Eric Larose

  • Vincent Rossetto

  • Ludovic Margerin

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