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- W2023556919 abstract "The effects of a randomly rough boundary on normal mode propagation in a rigid-walled waveguide have been studied theoretically and experimentally. The theoretical solution considers steep-sloped roughness elements and uses the low-frequency technique of Tolstoy [J. Acoust. Soc. Am. 75, 1–22 (1984)]. It is predicted that, at frequencies below the first mode cutoff, the mode generated in the rough-walled waveguide has a greater amplitude at the rough boundary than at the smooth boundary and propagates with a constant phase plane wavefront at a slower speed than in the smooth-walled waveguide. The laboratory experiment, using gravel and frequencies up to 10 kHz, shows excellent agreement with the theoretical prediction. The eigenfunction perturbations and phase velocity changes caused by steep-sloped roughness elements are discussed for higher frequencies and higher order modes. [Research supported by the Office of Naval Research.]" @default.
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- W2023556919 date "1985-11-01" @default.
- W2023556919 modified "2023-10-14" @default.
- W2023556919 title "Normal mode propagation in a rough‐walled waveguide" @default.
- W2023556919 doi "https://doi.org/10.1121/1.2023042" @default.
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