B. Dubus et al., FREQUENCY DERIVATIVE APPROACH FOR IDENTIFICATION OF THE WAVE RESONANCES ON IMMERSED ELASTIC BODIES, The Journal of the Acoustical Society of America, 102(6), 1997, pp. 3523-3529
Acoustic scattering by elastic bodies is usually analyzed in terms of
resonances, the frequency, width, and order of which should be determi
ned. In this paper, a simple approach based on a frequency derivative
of the scattered pressure is proposed for resonance order identificati
on on bodies of arbitrary shape. The method is applied to the acoustic
scattering of a plane wave by a spherical shell for validation and by
a cylindrical shell bounded by hemispherical end caps. In both cases,
the A and S-0 wave resonances are identified. (C) 1997 Acoustical Soc
iety of America. [S0001-4966(97)03812-5].