| タイトル | Comparison of FFP predictions with measurements of a low-frequency signal propagated in the atmosphere |
| 本文（外部サイト） | http://hdl.handle.net/2060/19910007385 |
| 著者（英） | Wilson, K. Keith; Thomson, Dennis W. |
| 著者所属（英） | Pennsylvania State Univ. |
| 発行日 | 1990-12-01 |
| 言語 | eng |
| 内容記述 | An experimental study of low-frequency propagation over a distance of 770 m was previously reported (J. Acoust. Soc. Am. Suppl. 1 86, S120 (1989)). For that study, sound speed profiles were reconstructed entirely from surface-layer micrometeorological data. When the acoustic data were compared with theoretical predictions from a fast field program (FFP), it was found that the FFP underpredicted sound levels measured in a shadow zone. Here, the effect on the predictions of including meteorological data for heights greater than the surface layer, i.e., wind profiles measured by a Doppler sodar, is discussed. Vertical structure of turbulence is simulated by stochastically perturbing the mean profiles, and the agreement between the acoustic data and FFP predictions is improved. |
| NASA分類 | ACOUSTICS |
| レポートNO | 91N16698 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/134415 |
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