| 北极跨冰层水中声源方位估计实验与分析 |
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| 引用本文： | 陈晟,杨燕明,周鸿涛,文洪涛,黄二辉.北极跨冰层水中声源方位估计实验与分析[J].声学学报,2022,47(2):175-186. |
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| 作者姓名： | 陈晟 杨燕明 周鸿涛 文洪涛 黄二辉 |
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| 作者单位： | 自然资源部第三海洋研究所 厦门 361005 |
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| 基金项目： | 国家重点研发计划项目(2021YFC2801202,2018YFC1405903)；;国家自然科学基金项目(42076236)； |
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| 摘 要： | 为了获取北极冰下声源方位信息,在北极冰层上方布放检波器和冰下投放声弹声源开展了冰下声源的分频段方位估计实验。研究结果表明,冰下声源方位估计的误差、准确率与检波器接收信号频段(或冰下声源信号频段)有关。采用低频段的接收信号进行方位估计时准确率较高,误差均值较小,所用接收信号频段≤250 Hz时,方位估计准确率可达72.9%;反之,采用高频段的接收信号进行方位估计时准确率低,误差均值较大。采用不同频段接收信号进行冰下声源方位估计时,误差大小与该站位相同频段内的反射系数的变化有关:反射系数变化较大时,误差较大;否则,误差较小。
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| 关 键 词： | 方位估计 冰下声源 北极 反射系数 |
| 收稿时间： | 2021-01-11 |
Experiment and analysis on cross-ice bearing estimation for underwater acoustic source in the Arctic |
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| Affiliation: | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005 |
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| Abstract: | In order to obtain the bearing information of the acoustic source beneath the Arctic ice,by placing the geophones on the ice surface and dropping the acoustic bomb into the water under-ice,the experiment of the bearing estimation by the division frequency band for the acoustic source beneath the Arctic ice was carried out.The results show that the error and accuracy of bearing estimation are related to the received signal frequency(or the signal frequency of underwater sound source)of the geophone.When the received signal in low frequency band was used for bearing estimation,the accuracy was high and the mean error was small.When the frequency of the received signal was less than and equal to 250 Hz,the accuracy of bearing estimation can reach 72.9%.On the contrary,when the received signal in high frequency band was used for the bearing estimation,the accuracy was low and the mean error was large.When the received signals of different frequency bands were used to estimate the bearing of the under-ice sound source,the estimation error was related to the variation of the reflection coefficient of the water ice interface in the same frequency band.If the change of the reflection coefficient was great,the bearing estimation error was large.Otherwise,the bearing estimation error was small. |
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