Experimental investigation of oceanic ambient noise generated by typhoon in deep ocean

Yang, Qi; Yang, Kunde; Huang, Chunlong; Zhang, Yukun; Zhou, Xingyue; Xue, Rui; Liu, Hong

doi:10.1109/oceanse.2019.8867205

Cited by 1 publication

(1 citation statement)

References 12 publications

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“…The spectral characteristics of ambient noise in the deep ocean are continually changing due to changes in the nature and positions of the many sources that contribute to it [1] as well as the fluctuations in transmission associated with varying oceanographic conditions [2]- [5]. Understanding the variability of ambient noise in the ocean is essential for investigating natural ocean processes such as wind [6]- [12], submarine seismic activity [13]- [16], and breaking waves [17]- [20] as well as for monitoring anthropogenic activities such as oil exploration [21] and marine transport [22]- [26].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Ambient Noise Spectrum Level Correlation Characteristics in the China Sea

Zhou

2020

IEEE Access

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The ambient noise field in the ocean is formed by a mixture of many source types, such as seismic noise, marine noise, shipping noise, and wind-generated noise. The correlation matrices of the ambient noise spectrum levels offer a promising approach for identifying and isolating the active source mechanisms in ambient noise datasets. This study attempts to use frequency correlation matrices to examine inter-frequency relationships and identify frequency bands that are dominated by specific sources present in samples of ambient noise. Deep-ocean ambient noise recorded by hydroacoustic monitoring systems in the East China Sea and South China Sea was used to analyze the frequency correlation characteristics over a broadband frequency range, with a focus on the contribution of wind-related and shipping-related source mechanisms to the overall ambient noise field at various frequencies. The primary sources observed in both the South China Sea and East China Sea were shipping sources and wind sources. During the observation window, wind was responsible for a significant amount of the ambient noise energy above 477 Hz in the East China Sea, while the corresponding frequency threshold was shifted up to 575 Hz in the South China Sea. Another interesting feature was also observed in the East China Sea: a higher degree of correlation was found between the levels at the wind noise dominated frequencies and mixture noise (mainly consisting of wind noise and shipping noise) dominated frequencies at the upper receiver than at the lower receiver. Data analysis results show that the cause of this effect is that shipping activity contributes more to the soundscape at the lower receiver than at the upper receiver.

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Section: Introductionmentioning

confidence: 99%

Analysis of Ambient Noise Spectrum Level Correlation Characteristics in the China Sea

Zhou

2020

IEEE Access

View full text Add to dashboard Cite

show abstract

Experimental investigation of oceanic ambient noise generated by typhoon in deep ocean

Cited by 1 publication

References 12 publications

Analysis of Ambient Noise Spectrum Level Correlation Characteristics in the China Sea

Analysis of Ambient Noise Spectrum Level Correlation Characteristics in the China Sea

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