LAUSR

In the context of sound-speed profile measurement by the image source method, interface roughnesses are responsible for result uncertainties. The image source method models the reflected wave from a layered media as a collection of images which are the mirror reflections of the real source over the interfaces. From image source positions, one can deduce the sound-speed profile. Interface roughnesses might blur these image sources and reduce the accuracy of their localization. Using the Langston-Kirchhoff model of a 3D layered media with rough interfaces, it is possible to perform a parametric study of these uncertainties as a function of roughness parameters. In the aim of performing roughness parameter inversion, theoretical uncertainties are calculated and compared with estimated uncertainties from numerical experiments.