National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600100, India.
Mar Pollut Bull. 2021 Dec;173(Pt B):113035. doi: 10.1016/j.marpolbul.2021.113035. Epub 2021 Oct 20.
Sound Pressure Levels were recorded using an Automated Noise Measurement System, during July 2015 - April 2016 at the Kongsfjorden, Arctic. The fjord houses the NyAlesund port and has many vessels plying during summer, which contributes to anthropogenic noise. Spectral distribution and average sound level at 1/3-octave band from 63 Hz to 5000 Hz has been analyzed and correlated with Automatic Identification System marine traffic data. The radiated acoustic field from vessel transits has been predicted through source level modeling for different category vessels. Further, an acoustic propagation model MMPE based on Parabolic Equation method has been used to evaluate range dependent propagation along the fjord and Transmission Loss estimates have been calculated for upslope and down slope cases. Noise due to shipping has been estimated using Source-Path-Receiver Model using Propagation Loss model estimates, Sound Pressure Level, and Source Level predictions. Noise maps with level contours are generated for shipping, depicting the maximum sound levels for the Kongsfjorden.
在 2015 年 7 月至 2016 年 4 月期间，我们在北极的 Kongsfjorden 使用自动噪声测量系统记录了声压级。峡湾拥有 NyAlesund 港口，夏季有许多船只往来，这导致了人为噪声。我们分析了 63 Hz 至 5000 Hz 倍频程的声谱分布和平均声级，并将其与自动识别系统船舶交通数据相关联。我们通过对不同类别的船只进行声源级建模，预测了船只通过时的辐射声场。此外，我们还使用基于抛物线方程的 MMPE 声传播模型来评估峡湾内随距离变化的传播情况，并计算了上坡和下坡情况下的传输损耗估计值。我们使用声源-路径-接收器模型，结合传播损耗模型估算值、声压级和声源级预测值，来估算船舶噪声。我们为 Kongsfjorden 生成了带有等高线的噪声图，描绘了该地区的最大声级。
