Radiated ship noise level estimates from measurements in a fjord
Radiated ship noise level estimates from measurements in a fjord
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DOI：
10.1121/1.4831212
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发表时间：
2013-12
影响因子：
2.4
通讯作者：
Stian Coward;D. Tollefsen;Hefeng Dong
中科院分区：
文献类型：
--
作者：
Stian Coward;D. Tollefsen;Hefeng Dong
本文给出了挪威奥斯洛峡湾商业船舶辐射噪声水平(20赫兹-1千赫)的估计。数据记录在两个联网的智能水下传感器单元中，每个单元都配备了一个放置在海床附近的全方位水听器，分别位于45米和110米的水深。由于附近两条航道(范围0.4-3.0公里)的交通而接收到的噪声水平是针对这些非理想的试验场条件，通过使用RAM传播模型处理并校正为单极声源水平，该模型具有来自辅助数据的距离估计、来自该地区先前调查的环境输入以及垂直分布的声源模型[Trevorrow等人，J.Acoust]。SoC。上午好。124(2)，767-778]来模拟不确定的震源深度。给出了货船源谱和宽带源能级的估计，并与文献中的深水测量结果进行了比较。
This paper presents estimates of radiated ship noise levels (20 Hz—1 kHz) due to commercial shipping in the Oslofjord (Norway). Data were recorded at two Networked Intelligent Underwater Sensors (NILUS) units, each equipped with an omni-directional hydrophone placed near the seabed, at water depths of 45 and 110 m, respectively. Received noise levels due to traffic in two nearby shipping lanes (ranges, 0.4–3.0 km) were for these non-ideal test site conditions processed and corrected to monopole source levels by use of the RAM propagation model with range estimates from auxiliary data, environmental input from a prior survey of the area, and a vertically distributed source model [Trevorrow et al., J. Acoust. Soc. Am. 124(2), 767–778] to model uncertain source depth. Estimates of source spectra and of broadband source levels of cargo ships are presented and compared with deep-water measurements from the literature.