Title :
Direct and Inverse Acoustic Spherical Wave Scattering by a Small Layered Sphere with Soft Core
Author :
Tsitsas, Nikolaos L. ; Athanasiadis, Christodoulos
Author_Institution :
Dept. of Math., Athens Univ.
Abstract :
A spherical acoustic wave is scattered by a three layered sphere with a soft core. Exact expressions of the fields in every layer and the exterior of the scatterer are established. Low frequency results are then obtained by approximating the exact expression of the scattering cross section. The inverse problem of determining the sphere´s center and the layers radii is treated from the knowledge of the scattering cross section´s low frequency expansion
Keywords :
acoustic field; acoustic wave scattering; inverse problems; multilayers; nonlinear acoustics; acoustic spherical wave scattering; field expressions; inverse problem; layers radii determination; low frequency analysis; nonlinear system; scattering cross section; small three layered sphere; soft core; sphere center determination; Acoustic scattering; Acoustic waves; Concrete; Frequency measurement; Geometry; Green´s function methods; Inverse problems; Linear systems; Mathematics; Position measurement;
Conference_Titel :
Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory, Proceedings of XIth International Seminar/Workshop on
Conference_Location :
Tbilisi, Georgia
Print_ISBN :
966-02-3873-8
DOI :
10.1109/DIPED.2006.314308
