Abstract
A three-dimensional modeling of spherical wave reflection on layered media with rough interfaces is used to study the roughness influence in sediment sound-speed profile measurements. The configuration of the numerical experiment consists of a point source and a horizontal array of hydrophones. In addition, theoretical uncertainties on the angle of arrival and travel time of a spherical wave reflected over a slightly rough interface are derived by including the array processing in the Helmholtz-Kirchhoff integral. The sound-speed profile sensitivity to those parameters is used to compare theory and numerical experiments. The agreement is good and shows a surprisingly strong influence of the roughness on the sound-speed profile measurement.
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