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>Acoustical effects of a large ridge on low-frequency sound propagation in stationary and moving atmospheres
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Acoustical effects of a large ridge on low-frequency sound propagation in stationary and moving atmospheres
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机译:大隆脊对固定和移动大气中低频声音传播的声学影响
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摘要
The effects of a ridge on a low-frequency acoustic propagation in quiescent and windy atmospheres are investigated using a parabolic approximation. A logarithmic wind-speed profile, commonly employed to model atmospheric wind currents, is modified and used to model two-dimensional atmospheric flow over a triangularly-shaped hill. The parabolic equation is solved using an implicit finite-difference algorithm. Several examples are examined to determine the combined effects of source-ridge distance, ridge dimensions, wind-speed profile, and CW source frequency on the received acoustic field.
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