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A novel noise reduction technique for underwater acoustic signals based on complete ensemble empirical mode decomposition with adaptive noise, minimum mean square variance criterion and least mean square adaptive filter

open access: yesDefence Technology, 2020
Underwater acoustic signal processing is one of the research hotspots in underwater acoustics. Noise reduction of underwater acoustic signals is the key to underwater acoustic signal processing.
Yu-xing Li, Long Wang
doaj   +3 more sources

Underwater noise levels in UK waters [PDF]

open access: yesScientific Reports, 2016
AbstractUnderwater noise from human activities appears to be rising, with ramifications for acoustically sensitive marine organisms and the functioning of marine ecosystems. Policymakers are beginning to address the risk of ecological impact, but are constrained by a lack of data on current and historic noise levels.
Merchant, Nathan D.   +5 more
openaire   +4 more sources

Study on underwater noise characteristics and mechanism of discharge flow from wide-crested weir. [PDF]

open access: yesPLoS ONE
To provide theoretical guidance and technical support for mitigating underwater noise generated by discharge flow from wide-crested weirs, this study integrates physical experiments and numerical simulations.
Qingxiang Shui   +5 more
doaj   +2 more sources

Environmental Impact of Underwater Noise [PDF]

open access: yesPomorski zbornik, 2022
The description of sound as a form of energetic pollutant is very complex as is also its impact on aquatic life. Human activities causing continuous and implosive underwater noise, such as marine traffic, maintenance of ships, coastal tourism, marine research, military, offshore energy platforms, generation of ocean energies and construction operations
Runko Luttenberger, Lidija   +3 more
openaire   +2 more sources

Research on Underwater Image Denoising Based on Dual-Channels Residual Network [PDF]

open access: yesJisuanji gongcheng, 2023
As an effective underwater exploration tool, underwater image denoising has received increasing attention and research in academia.To address the vulnerability of traditional filtering methods to image degradation in the denoising process, with obvious ...
YANG Jingjing, XIE Haiyan, XUE Nini, ZHANG Aoming
doaj   +1 more source

Underwater Color-Cast Image Enhancement by Noise Suppression and Block Effect Elimination

open access: yesJournal of Marine Science and Engineering, 2023
Efficient underwater visual environment perception is the key to realizing the autonomous operation of underwater robots. Because of the complex and diverse underwater environment, the underwater images not only have different degrees of color cast but ...
Yu Ning   +3 more
doaj   +1 more source

BIT ERROR PERFORMANCE ENHANCEMENT FOR UNDERWATER ACOUSTIC NOISE CHANNEL BY USING CHANNEL CODING

open access: yesJournal of Engineering and Sustainable Development, 2023
The harm that underwater noise pollution poses to aquatic ecosystems and the resources that support it are being acknowledged on a worldwide scale. Fisheries and ecotourism are only two of the important businesses that are impacted by noise pollution ...
Thamer Easa Murad, Yasin Al-Aboosi
doaj   +1 more source

Compressed Sensing Multiscale Sample Entropy Feature Extraction Method for Underwater Target Radiation Noise

open access: yesIEEE Access, 2022
Accurate underwater target detection and recognition in complex marine environments has always been a challenge. There is a lot of information in underwater target radiation noise that is important for underwater target recognition.
Zhufeng Lei   +4 more
doaj   +1 more source

Measurement of Underwater Acoustic Energy Radiated by Single Raindrops

open access: yesSensors, 2021
Underwater noise produced by rainfall is an important component of underwater ambient noise. For example, the existence of rainfall noise causes strong disturbances to sonar performance.
Shu Liu   +4 more
doaj   +1 more source

Measurements of underwater operational noise caused by offshore wind turbine off the southwest coast of Korea

open access: yesFrontiers in Marine Science, 2023
As interest in the development of renewable energy increases, a large number of offshore wind farms are being built worldwide. Accordingly, the potential impacts of underwater operational noise on marine ecosystems have become an issue, and thus it is ...
Young Geul Yoon   +3 more
doaj   +1 more source

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