Article Dans Une Revue Applied Physics Letters Année : 2010

Locating a small change in a multiple scattering environment

Résumé

This article presents an imaging technique to locate a weak perturbation in a multiple scattering environment. We derive a formula to predict the spatio-temporal decorrelation of diffuse coda waves induced by an extra-scatterer. Locating this new defect is formulated as an inverse problem which is solved by a maximum likelihood approach. Using elastic waves in the 50-400~kHz frequency band, we recover the position of a millimetric hole drilled in a concrete sample with a precision of a few cm. Note that the size of the defect is comparable to the size of the myriads of heterogeneities constituting the sample.

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hal-00503898 , version 1 (19-07-2010)

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Éric Larose, Thomas Planes, Vincent Rossetto, Ludovic Margerin. Locating a small change in a multiple scattering environment. Applied Physics Letters, 2010, 96 (20), pp.204101. ⟨10.1063/1.3431269⟩. ⟨hal-00503898⟩
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