Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1900135 | Wave Motion | 2014 | 17 Pages |
Abstract
We consider scattering of a pulse propagating through a three-dimensional random media and study the shape of the pulse in the parabolic approximation. We show that, similarly to the one-dimensional O'Doherty-Anstey theory, the pulse undergoes a deterministic broadening. Its amplitude decays only algebraically and not exponentially in time, due to the signal low/midrange frequency component. We also argue that the parabolic approximation captures the front evolution (but not the signal away from the front) correctly even in the fully three-dimensional situation.
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Authors
Guillaume Bal, Olivier Pinaud, Lenya Ryzhik, Knut Sølna,