Passive tracking of underwater acoustic targets based on multi-beam LOFAR and deep learning
PLoS ONE, 2022 Conventional passive tracking methods for underwater acoustic targets in sonar engineering generate time azimuth histogram and use it as a basis for target azimuth and tracking.
Maofa Wang +4 more
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Acoustic methods improve the detection of the endangered African manatee
Frontiers in Marine Science, 2023 The African manatee (Trichechus senegalensis) is an elusive, data-deficient, and endangered species which inhabits marine and freshwater systems throughout Western and Central Africa.
Clinton Factheu +7 more
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Dose-response relationships for the onset of avoidance of sonar by free-ranging killer whales [PDF]
, 2014 The authors acknowledge the support of the MASTS pooling initiative (The Marine Alliance for Science and Technology for Scotland) in the completion of this study.
Samarra, Filipa Isabel Pereira +21 more
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The use of active sonar to study cetaceans [PDF]
, 2012 Cetacean species face serious challenges worldwide due to the increasing noise pollution brought to their environment by human activities such as seismic exploration. Regulation of these activities is vaguely defined and uncoordinated.
Bernasconi, Matteo
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Underwater Acoustic Research Trends with Machine Learning: Active SONAR Applications
한국해양공학회지, 2020 Underwater acoustics, which is the study of phenomena related to sound waves in water, has been applied mainly in research on the use of sound navigation and range (SONAR) systems for communication, target detection, investigation of marine resources and
Haesang Yang +4 more
doaj +1 more source
Dolphin-inspired target detection for sonar and radar [PDF]
, 2014 Gas bubbles in the ocean are produced by breaking waves, rainfall, methane seeps, exsolution, and a range of biological processes including decomposition, photosynthesis, respiration and digestion.
Leighton, T.G. +3 more
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Stationauxiliary operation technology for sonar digital image processing based on machine vision [PDF]
Zhihui kongzhi yu fangzhenPassive sonar operator of a ship needs to concentrate on observing sonar interface and underwater or surface target situation for a long time to extract key information manually maritime operations when surface vessels pass through sensitive waters ...
DAI Zhonghua, JIN Qiaoyuan, YANG Ding, CHENG Yu
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Effective beam pattern of the Blainville's beaked whale (Mesoplodon densirostris) and implications for passive acoustic monitoring [PDF]
, 2013 This work was funded by two partners under the National Oceanographic Partnership Program: the Ocean Acoustics Program of the U.S. National Marine Fisheries Service, Office of Protected Resources, and the International Association of Oil and Gas ...
Johnson, Mark +9 more
core +1 more source
Active Control of the Reflection Coefficient of an Underwater Surface
Acoustics, 2023 From a strategic point of view, it is essential to protect underwater vehicles from being detected by opponents. Modern mono- or bistatic sonar systems are capable of precisely determining the position of a watercraft.
Johannes Timmermann +2 more
doaj +1 more source
Multi-Stage Feature Extraction and Classification for Ship-Radiated Noise
Sensors, 2021 Due to the complexity and unique features of the hydroacoustic channel, ship-radiated noise (SRN) detected using a passive sonar tends mostly to distort. SRN feature extraction has been proposed to improve the detected passive sonar signal. Unfortunately,
Hamada Esmaiel +5 more
doaj +1 more source