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Abstract
The angular and spectral scattering patterns from local admittance fluctuations, assumed to be caused by the presence of mechanical, dumbbell oscillators attached more or less randomly in the interior of a cylindrical shell, are predicted numerically and compared to the experimental measurements reported by Bucaro et al. [Proc. ASME, Noise Control and Acoustics Division, NCA 22, 87–92 (1996)] and Photiadis et al. [J. Acoust. Soc. Am. 101, 895–899 (1997)]. The numerical results are shown to be in reasonable agreement with what is observed experimentally. It is suggested that scattering contributions from such local admittance fluctuations can be a significant component in the midfrequency scattering patterns of submerged targets of interest. [Work supported by the Office of Naval Research.]
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