| 声波在湍流大气中的散射衰减 |
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| 引用本文： | 姚展予.声波在湍流大气中的散射衰减[J].应用气象学报,1994,5(1):82-89. |
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| 作者姓名： | 姚展予 |
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| 作者单位： | 1.中国气象科学研究院 |
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| 摘 要： | 文章推导出了改进的大气声散射截面σ(θ)表达式，确定了大气声散射系数αs的解析表达式，并得出改进的大气声折射指数脉动结构系数c2n表达式。实测结果表明，在潮湿大气中，湿度脉动和温湿相关脉动与温度脉动一样是影响声散射衰减的重要因子，而在干燥大气中，湿度脉动的影响可以忽略。
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| 关 键 词： | 声波 湍流大气 散射衰减 |
Acoustic Scattering Attenuation in the Turbulent Atmosphere |
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| Yao Zhanyu.Acoustic Scattering Attenuation in the Turbulent Atmosphere[J].Quarterly Journal of Applied Meteorology,1994,5(1):82-89. |
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| Authors: | Yao Zhanyu |
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| Institution: | 1.(Chinese Academy of Meteorological Sciences, Beijing 100081) |
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| Abstract: | In the paper, an improved formula of atmospheric acoustic scattering cross-section α(θ) is derived and a formula of atmospheric acoustic scattering coefficient αs is established. Moreover, the improved formula of atmospheric acoustic refractive index fluctuation structure coefficient is obtained. The actual measurements show that in the wet air, humidity fluctuation and temperature-humidity cross-correlation fluctuation are the same important factors to atmospheric acoustic scattering attenuation as temperature fluctuation, while in the dry air, humidity fluctuation is ignored. |
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| Keywords: | Acoustic wave Turbulent atmosphere Scattering attenuacion |
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