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Mode conversion noise attenuation, modelling and removal: case studies from Cyprus and Egypt
- Source: First Break, Volume 36, Issue 12, Dec 2018, p. 113 - 120
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- 01 Dec 2018
Abstract
Abstract
The wavefront from a source that strikes an acoustic impedance contrast separates into four variables: transmitted and reflected compressional waves (P-wave) and transmitted and reflected shear waves (S-wave). Converted waves are those whose mode changes at the interface and can be recorded in a marine environment in the presence of large velocity contrasts. The difference in acoustic velocities at the boundary means that in high contrast media the distinction between compressional and shear velocities across the boundary is small; shear waves are not as refracted as compressional waves and can be recorded as partially converted reflected energy.
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