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- W3133214897 abstract "There is substantial interest in the analytical and numerical modeling of low-frequency, long-range atmospheric acoustic propagation. Ray-based models, because of frequency limitations, do not always give an adequate prediction of quantities such as sound pressure or intensity levels. However, the parabolic approximation method, widely used in ocean acoustics, and often more accurate than ray models for lower frequencies of interest, can be applied to acoustic propagation in the atmosphere. Modifications of an existing implicit finite-difference implementation for computing solutions to the parabolic approximation are discussed. A locally-reacting boundary is used together with a one-parameter impedance model. Intensity calculations are performed for a number of flow resistivity values in both quiescent and windy atmospheres. Variations in the value of this parameter are shown to have substantial effects on the spatial variation of the acoustic signal." @default.
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- W3133214897 date "1989-08-31" @default.
- W3133214897 modified "2023-09-24" @default.
- W3133214897 title "Low-frequency sound propagation modeling over a locally-reacting boundary using the parabolic approximation" @default.
- W3133214897 hasPublicationYear "1989" @default.
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