利用噪声谱进行风浪声场特征反演

Inversion of Wind Wave Acoustic Parameters Using Synthetic Noise Spectrum Model

中文关键词:  声场特征  风浪  噪声谱  信号反演

英文关键词:acoustic parameter  wind wave  noise spectrum  signal inversion

中文摘要:

      通过建立修正的风浪噪声模型，研究风浪声场特征的反演。在实测数据中提取100段进行频谱分析，建立不同频段噪声谱均值曲线。利用均值曲线风浪模型进行优化，建立修正的风浪声场特征反演模型。对APL和库普曼-费尔拉风浪噪声模型进行修正获得高频段反演模型；对克努森频谱浅海区模型进行修正获得低频段反演模型。对建立的全频段模型进行数据反演，生成一定范围内幅值服从高斯分布、相位服从均匀分布的噪声信号，即风浪信号时域输出。仿真结果表明，利用合理的反演模型，可以通过数据反演获得准确的海洋风浪噪声声场特征信号。为评价反演的准确性，对反演结果进行验证分析。

英文摘要:

      The spectrum characteristics of specific strength wind wave in different bands based on the study of measured data are analyzed.By correcting the APL and Koopman Ferla model and Knudsen Spectrum shallow water model with the measured data,modified wind wave acoustic parameter inversion model is built.Wind wave signal is outputted by inversion,whose amplitude follows the Gauss distribution and phase obeys uniform distribution.The result shows that on the basis of the accurate inversion model,acoustic parameters signal of ocean wind wave noise could be obtained through data inversion.The result is verified to estimate the accuracy of the inversion model.