Abstract
We investigate the scattering of the radiation from an acoustic point source by a solid, elastic prolate spheroid at a variety of transducer–scatterer separations. We find that the most important effect, when contrasted to the plane-wave limit, is an increase in scattering strength (with decreasing transducer–scatterer separation) associated with the 1/r variation of the incident field and the finite size of the scatterer. We use the results of this investigation to formulate a rough criterion for establishing the farfield region in scale model scattering experiments in the low-frequency region.
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