| Abstrakt: |
The spheroidal-coordinate-based transition matrix has been successfully applied to the solution and the analysis of the acoustic scattering from large aspect ratio solids [R. H. Hackman and D. G. Todoroff, J. Acoust. Soc. Am. 78, 1058-1071 (1985)]. However, this approach required special care due to the existence of elastic states that were weakly coupled to the external acoustic field. Here, a new version of the spheroidal formalism is presented, one with improved stability and which is better suited to thin shells. This approach is applied to the acoustic scattering from a large aspect ratio, elastic prolate spheroidal shell of constant thickness. Theoretical predictions are compared with experimental measurements, and a physical explanation is given for the more prominent features in the backscattered formfunction. [ABSTRACT FROM AUTHOR] |
