| DA Lianglong,WANG Chao,HAN Mei,ZHANG Lin. 2014. Ambient noise spectral properties in the north area of Xisha. Acta Oceanologica Sinica, 33(12):206－211 |
| Ambient noise spectral properties in the north area of Xisha |
| 西沙北部海域海洋环境噪声频谱特性 |
| Received:April 28, 2014 Revised:August 04, 2014 |
| DOI：10.1007/s13131-014-0569-4 |
| Key words:ambient noise cross correlation wind speed |
| 中文关键词: 环境噪声 互相关 风速 |
| 基金项目:The New Century Excellent Talents in University (NCET Program) of China. |
| Author Name | Affiliation | E-mail | | DA Lianglong | Navy Submarine Academy, Naval Underwater Battlefield Environment Institution, Qingdao 266071, China | | | WANG Chao | Navy Submarine Academy, Naval Underwater Battlefield Environment Institution, Qingdao 266071, China | 120107769@qq.com | | HAN Mei | Navy Submarine Academy, Naval Underwater Battlefield Environment Institution, Qingdao 266071, China | | | ZHANG Lin | Navy Submarine Academy, Naval Underwater Battlefield Environment Institution, Qingdao 266071, China | |
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| Abstract: |
| Ambient noise is very important in the prediction system of a sonar performance, because it determines the detection ranges always in a passive sonar and usually in an active sonar. In the uncertainty issue for the sonar performance, it is necessary to know this factor's statistical characteristics that are only obtained by data processing from the underwater ambient noise measurements. Broad-band ambient noise signals from 16 hydrophones were amplified and recorded for 2 min every 1 h. The results show that the ambient noise is essentially depth independent. The cross correlation of the ambient noise levels (1, 6 and 12 h average) with a wind speed is presented. It was found that the correlation is excellent on the upper frequency band and the noise levels correlate better with high wind speed than with low wind speed. |
| 中文摘要: |
| 主动声纳和被动声纳系统的探测范围与海洋环境噪声密切相关,因此它在声纳性能预报系统中非常重要.在声纳系统的不确定分析中,需要知道海洋环境噪声的统计特性,而这只能通过环境噪声测量并进行信号分析处理得到.16通道海洋环境噪声测量系统每小时测量两分钟噪声信号,数据处理结果表明,噪声谱级在海水中部基本不随接收深度发生变化.文章还给出了噪声谱级(1h、6h和12h平均)与风速的互相关系数,结果表明,在高频段噪声谱级与风速具有很好的相关性,且噪声谱级与高风速的相关性好于与低风速的相关性. |
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