期刊
WAVES IN RANDOM AND COMPLEX MEDIA
卷 24, 期 2, 页码 99-125出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17455030.2014.880821
关键词
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资金
- ANR [JC08_313906 SISDIF]
- VOR program
We report on theoretical predictions of the decorrelation and phase-shift of coda waves induced by local changes in multiple scattering media. Using the multiple scattering formalism, we show that both expressions (decorrelation and phase-shift) involve a same sensitivity kernel based on the intensity transport in the medium. We compare the kernels based on the diffusion approximation with the ones based on the radiative transfer approximation, showing that the latter is more accurate at short times or for changes located close to the source or the receiver. We also perform a series of numerical simulations of wave propagation (finite differences) to validate our models in different configurations.
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