Results 31 to 40 of about 18,578,389 (206)
Simulated Research on Passive Sonar Range Using Different Hydrographic Conditions
, 2015 As an example using the passive sonar, it calculated the quality factor of passive sonar using the sonar equation. The sound field was calculated under different depth and range using multiform hydrographic conditions.
XueGang Zhang +7 more
core +2 more sources
Sensors, 2020 A target angular information in 3-dimensional space consists of an elevation angle and azimuth angle. Acoustic signals propagating along multiple paths in underwater environments usually have different elevation angles.
Raegeun Oh +2 more
doaj +1 more source
Estimation on the Underwater Explosion Equivalent Based on the Threshold Monitoring Technique
Shock and Vibration, 2021 Underwater nuclear explosions can be monitored in near real-time by the hydroacoustic network of the International Monitoring System (IMS) established by the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which could also be used to monitor underground ...
Yan Wang +6 more
doaj +1 more source
Frequency Analysis of Acoustic Data Using Multiple-Measurement Sparse Bayesian Learning
Sensors, 2021 Passive sonar systems are used to detect the acoustic signals that are radiated from marine objects (e.g., surface ships, submarines, etc.), and an accurate estimation of the frequency components is crucial to the target detection.
Myoungin Shin +3 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
core +1 more source
Validation of the F-POD-A fully automated cetacean monitoring system.
PLoS ONE, 2023 The F-POD, an echolocation-click logging device, is commonly used for passive acoustic monitoring of cetaceans. This paper presents the first assessment of the error-rate of fully automated analysis by this system, a description of the F-POD hardware ...
Julia Ivanchikova, Nicholas Tregenza
doaj +1 more source
Pitch shifting techniques for high-frequency passive sonar audio [PDF]
, 2017 Listening to passive sonar signals is a vital tool for sonar operators to classify underwater sound sources. While many passive sonar systems operate in the human auditory range (20 Hz to 20 kHz) there are a considerable number of high-frequency systems ...
Treptow, Aaron Charles
core +1 more source
Research advances and development trends in acoustic target detection
Zhongguo Jianchuan YanjiuUnderwater target detection faces severe challenges due to the enhanced acoustic stealth capabilities of targets and the anomalous sound propagation phenomena within complex ocean waveguides.
Yixin YANG +5 more
doaj +1 more source
Sensors, 2023 The utilization of stationary underwater cameras is a modern and well-adapted approach to provide a continuous and cost-effective long-term solution to monitor underwater habitats of particular interest.
Gordon Böer +7 more
doaj +1 more source
Portable passive digital sonar signal processing architecture design and implementation [PDF]
, 2021 “The present work shows the development of a signal processing architecture for a passive sonar with portability capability, using the neww hybrid technology of FPGA and CPU in the same IC package.
HUESCA ALVAREZ, LUIS MIGUEL; 800422 +1 more
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