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17 May 2010

Volume 96, Issue 20, Articles (20xxxx)

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Appl. Phys. Lett. 96, 203102 (2010); http://dx.doi.org/10.1063/1.3429125 (3 pages)

Qimin Quan, Parag B. Deotare, and Marko Loncar
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Locating a small change in a multiple scattering environment

Eric Larose, Thomas Planes, Vincent Rossetto, and Ludovic Margerin

Appl. Phys. Lett. 96, 204101 (2010); http://dx.doi.org/10.1063/1.3431269 (3 pages) | Cited 9 times

Online Publication Date: 19 May 2010

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This article presents an imaging technique to locate a weak perturbation in a multiple scattering environment. We derive a formula to predict the spatiotemporal 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 centimeter. Note that the size of the defect is comparable to the size of the myriads of heterogeneities constituting the sample.
Show PACS
81.70.Cv Nondestructive testing: ultrasonic testing, photoacoustic testing
62.65.+k Acoustical properties of solids
43.60.Lq Acoustic imaging, displays, pattern recognition, feature extraction
43.35.Zc Use of ultrasonics in nondestructive testing, industrial processes, and industrial products
89.20.Kk Engineering
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