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Local admittance model for acoustic scattering from a cylindrical shell with many internal oscillators

1998; Acoustical Society of America; Volume: 103; Issue: 4 Linguagem: Inglês

10.1121/1.421338

1520-9024

J. A. Bucaro, Anthony J. Romano, Angie Sarkissian, Douglas M. Photiadis, Brian H. Houston,

Ultrasonics and Acoustic Wave Propagation

This paper considers whether local admittance fluctuations can explain the acoustic scattering from a submerged shell with many internal oscillators observed by Bucaro et al. [Proc. ASME, Noise Control and Acoustics Div., NCA 22, 87–92 (1996)] and Photiadis et al. [J. Acoust. Soc. Am. 101, 895–899 (1997)]. The scattering is computed using a Helmholtz-based approach for a locally reacting surface whose admittance is affected by the random placement of internal oscillators. The predicted scattering patterns versus frequency and monostatic scattering angle are shown to agree with what is observed in the measured results.