| 浅海内波环境下声场时间相关特性 |
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| 引用本文： | 胡平,彭朝晖,李整林. 浅海内波环境下声场时间相关特性[J]. 应用声学, 2021, 40(5): 731-737 |
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| 作者姓名： | 胡平 彭朝晖 李整林 |
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| 作者单位： | 中国科院声学研究所声场声信息国家重点实验室,中国科院声学研究所声场声信息国家重点实验室,中国科院声学研究所声场声信息国家重点实验室 |
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| 摘 要： | 浅海内波是导致声场时间相关半径减小的一个重要原因.利用2015年南中国海声传播起伏实验,对比分析了线性内波以及孤立子内波环境下声场时间相关半径的统计特性.实验数据(175～225 Hz)表明,大振幅孤立子内波的存在极大地降低了声场的时间相关半径,声场时间相关半径从线性内波环境下的1～3 h,降低为孤立子内波环境下的小于...
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| 关 键 词： | 浅海声传播 线性内波 孤立子内波 声场时间相关 |
| 收稿时间： | 2020-06-24 |
| 修稿时间： | 2021-08-29 |
Effects of the internal waves on the temporal correlation of the acoustic field in shallow water |
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| HU Ping,PENG Zhao-hui and LI Zheng-lin. Effects of the internal waves on the temporal correlation of the acoustic field in shallow water[J]. Applied Acoustics(China), 2021, 40(5): 731-737 |
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| Authors: | HU Ping PENG Zhao-hui LI Zheng-lin |
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| Affiliation: | State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences |
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| Abstract: | The activity of internal waves in shallow water is an important reason for the decrease of temporal correlation length. Using the data of experiment conducted in 2015 in the northern of South Chinese Sea experiment, the statistical characteristics of the temporal correlation of the acoustic field under the conditions of linear internal waves and soliton internal waves are compared and analyzed. Experimental data shows that nonlinear internal waves greatly reduce the temporal correlation of the acoustic field. The temporal correlation length can decrease from 1-3 hours in the linear internal wave environment to less than 20 minutes in the internal soliton wave environment. In this paper, simulations based on RAM, a popular PE program, is used to interpret the above phenomenon well. |
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| Keywords: | Shallow water sound propagation, Linear internal wave, Internal solitons, temporal correlation |
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