Results 21 to 30 of about 3,182,231 (221)
Research on submarine underwater acoustic effectiveness against airborne sonar [PDF]
Zhihui kongzhi yu fangzhen, 2023 To get the best strategy of submarine underwater acoustic countermeasure against active/passive airborne sonar in normal conditions, this paper constructs the underwater acoustic environment model, sonar detection model and submarine underwater acoustic ...
KANG Le, SUN Baosan, ZHANG Weili
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Method for Characterizing Active Sonar Interference Fringes Based on the Sum of Curvature [PDF]
Jisuanji gongcheng, 2022 Interference fringes are essential features for active sonar target recognition.In shallow-water environments, the energy propagation characteristics of acoustic waves are relatively complex, and signals follow two different paths:from the emitter to the
SUN Tongjing, YAN Zhiming, FAN Jun, ZHANG Hao
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IET Radar, Sonar & Navigation, 2021 Among so‐called active sensors that use self‐generated signals, sonar sensors are more challenging to implement than lidar and radar due in part to their limited angular field of sensing. A common solution to this challenge is scanning sensors that sweep
Masoud Jahromi Shirazi, Nicole Abaid
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A Track Initiation Method Based on Multiple Accumulation of Active Sonar Images
水下无人系统学报, 2023 To meet the requirements of autonomous detection of underwater moving targets in a strong reverberation background, a track initiation algorithm based on multiple accumulations of active sonar images was proposed to solve the problem of large amounts of ...
Kai WANG, Junsheng JIAO
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IEEE Access, 2023 For decades, the soft-kill strategy which detects high-speed underwater targets with passive sonar and attract the targets using decoys has been used. However, recently, the paradigm to respond to the high-speed underwater targets is shifting to a hard ...
Jinuk Park +3 more
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Robust adaptive beamforming method for active sonar in single snapshot [PDF]
MATEC Web of Conferences, 2019 Forming narrow beams is a useful way for active sonar to anti-reverberation when it works in the shallow water. High-resolution adaptive beamforming with the performance of narrow beamwidths and low sidelobe levels is a better and more efficient method ...
Sun Xu, Li Ranwei
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Journal of Marine Science and Engineering, 2021 Controlled exposure experiments (CEEs) have demonstrated that naval pulsed active sonar (PAS) can induce costly behavioral responses in cetaceans similar to antipredator responses. New generation continuous active sonars (CAS) emit lower amplitude levels
Charlotte Curé +10 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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Unsupervised active sonar contact classification through anomaly detection
EURASIP Journal on Advances in Signal Processing, 2023 Target detection and sonar contact classification with active sonar systems are not trivial especially when operating in coastal and shallow water environments with multipath propagation, high reverberation and clutter. It is even more difficult when the
Pietro Stinco +2 more
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The effects of sound propagation and avoidance behaviour on naval sonar levels received by cetaceans [PDF]
, 2012 The use of active sonar is deemed to be essential for naval operations, but its potential impact on marine life has raised concerns worldwide. In a risk-assessment framework, characterisation of risk of harm is accomplished by combining exposure ...
Wensveen, Paul J.
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