Skip to Main content Skip to Navigation
Journal articles

Detection and localization of a defect in a reverberant plate using acoustic field correlation

Abstract : Green's function can be retrieved from cross-correlation of a diffuse field generated by noise sources. Today, this important result is the fundamental of several passive imaging techniques. The aim of this paper is to establish the suitability of these methods to detect and locate a defect in a reverberant elastic plate. The relations between the noise cross-correlation function over a few number of noise sources and the imaginary part of the Green's function are derived and numerically validated. Then we show through numerical experiments that this technique is exploitable for defect detection and localization in a differential mode, despite a non-perfect estimation of the Green's functions. Finally, a filtering technique based on the singular value decomposition is shown to improve the detection. © 2014 AIP Publishing LLC
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-00964507
Contributor : Collection Iemn <>
Submitted on : Monday, March 24, 2014 - 11:20:35 AM
Last modification on : Wednesday, June 2, 2021 - 4:26:19 PM

Identifiers

Citation

Lynda Chehami, Emmanuel Moulin, Julien de Rosny, Claire Prada, Olivier Bou Matar, et al.. Detection and localization of a defect in a reverberant plate using acoustic field correlation. Journal of Applied Physics, American Institute of Physics, 2014, 115, 104901, 7 p. ⟨10.1063/1.4867522⟩. ⟨hal-00964507⟩

Share

Metrics

Record views

653