Transient Ice Events of Underwater Ambient Noise in the Arctic Ocean

2022 5th International Conference on Information Communication and Signal Processing (ICICSP) Pub Date : 2022-11-26 DOI:10.1109/ICICSP55539.2022.10050649

Xueli Sheng, Meng Liu, Mengfei Mu, Chaoran Yang, Jing Xu

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Abstract

A large number of transient ice events exist in underwater ambient noise in the Arctic Ocean, and they are believed to be the main contributor to underwater noise different from contributors in other oceans. This paper studied the underwater ambient noise (CHINARE18 and CHINARE20) recorded during the 9th Chinese National Arctic Research Expedition and the 11th Chinese National Arctic Research Expedition. The time-frequency analysis of two 7-s-long ice noise samples in the two experiments shows that ice transient events have impulsivity and wide spectrum. The statistical result of transient ice events in different frequency bands reveals that these events mainly contribute to the high-frequency component of under-ice ambient noise. It can be seen in the power spectrum that transient energy is apparent in the 90th and 99th percentile curves. Due to the influence of ice transient events, the CHINARE18 has obvious fluctuations in the spectral kurtosis in a certain frequency band (4kHz-8kHz).

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北冰洋水下环境噪声的瞬态冰事件

北冰洋水下环境噪声中存在着大量的瞬态冰事件，它们被认为是不同于其他海洋水下噪声的主要贡献者。本文研究了中国第9次北极科考和第11次北极科考记录的水下环境噪声(CHINARE18和CHINARE20)。对两个实验中7s长冰噪声样品的时频分析表明，冰瞬态事件具有冲动性和广谱性。不同频带瞬态冰事件的统计结果表明，瞬态冰事件主要构成冰下环境噪声的高频分量。从功率谱中可以看出，在第90和99百分位曲线上，瞬态能量是明显的。由于冰瞬变事件的影响，CHINARE18在某一频段(4kHz-8kHz)的频谱峰度有明显的波动。

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2022 5th International Conference on Information Communication and Signal Processing (ICICSP)

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