Locating a weak change using diffuse waves: Theoretical approach and inversion procedure

  title={Locating a weak change using diffuse waves: Theoretical approach and inversion procedure},
  author={Vincent Rossetto and Ludovic Margerin and Thomas Plan{\`e}s and 'Eric Larose},
  journal={Journal of Applied Physics},
We describe a time-resolved monitoring technique for heterogeneous media. Our approach is based on the spatial variations of the cross-coherence of diffuse waves acquired at fixed positions but at different dates. The technique applies to all kind of waves, provided that waveforms can be acquired with a sampling frequency much larger than the wave frequency. To locate and characterize a weak change that occurred between successive acquisitions, we use a maximum likelihood approach combined with… 

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