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Leveraging satellite observations and machine learning for underwater sound speed estimation [PDF]
Communications EngineeringUnderwater acoustics plays a vital role in climate science, marine ecosystems, environmental monitoring, mineral exploration, and oceanography. Accurate underwater sound speed data is crucial for acoustic modeling and applications such as sonar systems ...
Madusanka Madiligama +2 more
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Journal of Marine Science and Engineering, 2021 Underwater wireless communication has gained a great deal of attention in the last couple of decades because of its applications in the military, industrial, and monitoring sectors.
Liu Songzuo +5 more
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Underwater acoustic metamaterials
National Science Review, 2022 Abstract Acoustic metamaterials have been widely investigated over the past few decades and have realized acoustic parameters that are not achievable using conventional materials. After demonstrating that locally resonant acoustic metamaterials are capable of acting as subwavelength unit cells, researchers have evaluated the possibility ...
Erqian Dong +5 more
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Passive depth estimation for a narrowband source using a single vector sensor in deep water [PDF]
JASA Express Letters, 2023 For a narrowband signal, an oscillating interference pattern is formed with a target's moving when receiving at the bottom of the sea. In this Letter, the interference pattern of a narrowband source is observed using a single vector sensor (SVS).
He Li +5 more
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Underwater acoustic target recognition using attention-based deep neural network [PDF]
JASA Express Letters, 2021 Underwater acoustic target recognition based on ship-radiated noise is difficult owing to the complex marine environment and the interference by multiple targets. As an important technology for target recognition, deep-learning has high accuracy but poor
Xu Xiao +4 more
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Model-based optimal action selection for Dyna-Q reverberation suppression cognitive sonar
EURASIP Journal on Advances in Signal Processing, 2023 The Doppler shift of low-speed targets is frequently disturbed by the reverberation Doppler spread clutter under the shallow sea. The clutter is generated by underwater scatterers, which increases the difficulty of Doppler estimation.
Yubin Fu +4 more
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A Hybrid–Source Ranging Method in Shallow Water Using Modal Dispersion Based on Deep Learning
Journal of Marine Science and Engineering, 2023 The relationship between modal elevation angle and the relative arrival time between modes, derived from exploiting modal dispersion, provides source information that is less susceptible to environmental influences.
Tong Wang +5 more
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Performance analysis on the speed spectrum estimation based on dual-HFM waveform
EURASIP Journal on Advances in Signal Processing, 2022 Real-time Doppler estimation of sonar signals is of great significance to underwater communication and detection. The Hyperbolic-Frequency-Modulated (HFM) waveform-based speed spectrum estimation is one of the modern methods for underwater Doppler ...
Runyu Wei +3 more
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Entropy and Information Theory in Acoustics
Entropy, 2022 Acoustics is one of the most studied fields in the 21st century, encompassing underwater acoustics, architectural acoustics, engineering acoustics, physical acoustics, environmental acoustics, psychological acoustics, signal processing in acoustics, and ...
Yuxing Li
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Estimating the parameters of the seabed using the spatial characteristics of ocean ambient noise [PDF]
MATEC Web of Conferences, 2019 When solving traditional underwater problems, the boundary condition is always used to calculate the sound field. In practice, however, it is hard to get the boundary conditions of the seabed. So geoacoustics inversion is needed to acquire the parameters
Li He, Guo Xiniyi, Ma Li, Song Guoli
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