Characterization and modeling of ultrasonic structural noise in the multiple scattering regime

T. Bedetti 1 V. Dorval 1 F. Jenson 1 A. Derode 2
1 DISC - Département Imagerie et Simulation pour le Contrôle
2 Institut Langevin ondes et images
Abstract : Multiple scattering can occur when performing ultrasonic measurements on highly scattering materials such as coarse grain steel or concrete. It constitutes in general a limiting factor for NDE techniques. In this communication, a method to simulate the structural noise due to multiple scattering is described. It requires three parameters: the diffusion constant, the elastic mean free path and the correlation distance. A method to obtain these parameters based on a single measurement procedure is presented. This approach has been applied to samples of coarse grain steel. The backscattered noise has been calculated for different probes and compared to experimental signals.
Keywords : Ultrasonic Grain Noise Multiple Scattering
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Conference papers
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https://hal-cea.archives-ouvertes.fr/cea-01828194
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Submitted on : Tuesday, July 3, 2018 - 9:36:15 AM
Last modification on : Thursday, April 4, 2019 - 1:32:40 AM

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T. Bedetti, V. Dorval, F. Jenson, A. Derode. Characterization and modeling of ultrasonic structural noise in the multiple scattering regime. 39th Annual Review of Progress in Quantative Nondestructive Evaluation (QNDE), Jul 2012, Denver, United States. pp.1158-1165, ⟨10.1063/1.4789174⟩. ⟨cea-01828194⟩

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