Abstract
For the complexity of the analytical expressions for acoustical scattering by even the most simplistic elastic bodies such as spheres and cylinders, inversion of the exact direct problem in analytical way is almost infeasible. So, this paper mainly studies the inverse problem in a numerous way. Low-frequency(ka<50) resonance spectra of targets with varied parameters including longitudinal wave velocity, shear wave velocity, material density and shell thickness are theoretically calculated using Resonance Scattering Theory(RST), and in what way the elastic parameters affect the resonance signature is analyzed and concluded. The results obtained have great significance on active classification research based on acoustical resonance scattering.
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