Peripheral Waves in the Scattering by Spherical Shells
We present here the results of applying resonance scattering theory to the problem of a plane acoustic wave scattering from a spherical shell with moderate thickness (with h = 1/32) and from a thick-walled shell (with h = 1/10). The computations have been carried out and analyzed in a broad frequency band (0 ≤ x ≤ 400) and for large orders of resonances (n ≲ 100). Attention is focused on the Lamb-type peripheral waves S j and A j (j = 0, 1, 2, 3, 4). The role of the so-called hidden resonances is elucidated.
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