Reflection of wavefronts by randomly layered media
نویسندگان
چکیده
منابع مشابه
Re ection of Wavefronts by Randomly Layered Media
We consider re ection of a pulse in a random medium with a strong re ector. We show that the wavefront of the re ected wave observed in the frame moving with the random propagation speed stabilizes to the deterministic waveform. The problem is studied using invariant imbedding. The results of numerical experiments illustrating the theory are presented.
متن کاملRe ection of Wavefronts by Randomly Layered
We consider reeection of a pulse in a random medium with a strong reeector. We show that the wavefront of the reeected wave observed in the frame moving with the random propagation speed stabilizes to the deterministic waveform. The problem is studied using invariant imbedding. The results of numerical experiments illustrating the theory are presented.
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We consider an active source embedded in a randomly layered medium. We study the cross-correlation functions of the signals recorded at a series of points located at the surface. We show that this information can be processed to locate the source inside the medium. The analysis is based on a separation of scales technique and limit theorems for random differential equations. The statistical sta...
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An acoustical pulse propagating in a randomly layered slab and scattered by the random inhomogeneities generates a reeected signal and a transmitted pulse followed by its coda. In the regime of separation of scales (correlation length of the random inhomogeneities much smaller than typical wavelengths contained in the pulse much smaller than the large scale of the medium comparable to the size ...
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We consider reflection of a pulse incident on a layered halfspace whose density and bulk modulus vary randomly. We show that when the pulse width is long compared to the average time it takes to travel over one correlation length, the reflected signal is approximately a Gaussian random process. The parameters of this process change slowly on a scale long compared to the pulse width. We give a f...
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ژورنال
عنوان ژورنال: Wave Motion
سال: 1994
ISSN: 0165-2125
DOI: 10.1016/0165-2125(94)90050-7