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Study of Sound Characteristics of Rain Noise at Sea

Abstract

海上降雨引起的噪声信号(简称降雨噪声)是海洋环境噪声背景场的一个重要干扰源,会极大地降低声呐的检测能力,影响水声通信的应用频段和降低水声设备的性能。考虑未来的海战极可能是在恶劣天气(往往伴随疾风暴雨)下进行,充分掌握降雨噪声的特性,不仅在军事上有利于检测海洋环境噪声背景中的干扰源,提升水声设备的作战效能,而且在民用上可拓展应用声学方法监测海上降雨的技术。近几十年来,美国等发达国家为了解释降雨噪声的产生机制,对自然界的降雨噪声开展了大量观测。前期的研究成果表明,降雨噪声的功率谱分布与空中降雨强度大小息息相关。但是,由于受限于降雨噪声的观测和数据获取的诸多困难与不确定性,现有的工作仍以揭示降雨噪声...When precipitation falls on the water surface, an acoustic signal with broadband frequency and strong intensity will be radiated in oscillogram pattern. It is now known as rain noise. As one of loudest sources, the intermittent rain noise can decrease the detection ability of sonar, affect the application frequency bands of underwater acoustic communication and reduce using performance of part of ...学位:理学博士院系专业:海洋与环境学院海洋学系_海洋物理学号:2242008015012

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