Results 1 to 10 of about 4,113,395 (325)
The Tacotron-Based Signal Synthesis Method for Active Sonar [PDF]
Sensors, 2022 The importance of active sonar is increasing due to the quieting of submarines and the increase in maritime traffic. However, the multipath propagation of sound waves and the low signal-to-noise ratio due to multiple clutter make it difficult to detect ...
Yunsu Kim +3 more
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Behavioural responses of fin whales to military mid-frequency active sonar [PDF]
Royal Society Open Science, 2023 The effect of active sonars on marine mammal behaviour is a topic of considerable interest and scientific investigation. Some whales, including the largest species (blue whales, Balaenoptera musculus), can be impacted by mid-frequency (1–10 kHz) military
Brandon L. Southall +11 more
doaj +3 more sources
Bio-Inspired Covert Active Sonar Strategy [PDF]
Sensors, 2018 The covertness of the active sonar is a very important issue and the sonar signal waveform design problem was studied to improve covertness of the system.
Jiajia Jiang +8 more
doaj +6 more sources
A Phase-Coded Sequence Design Method for Active Sonar [PDF]
Sensors, 2020 Phase-coded sequences are widely studied as the transmitted signals of active sonars. Recently, several design methods have been developed to generate phased-coded sequences satisfying specific aperiodic or periodic autocorrelation sidelobe level metrics.
Chengyu Guan, Zemin Zhou, Xinwu Zeng
doaj +3 more sources
First direct measurements of behavioural responses by Cuvier's beaked whales to mid-frequency active sonar [PDF]
Biology Letters, 2013 Most marine mammal strandings coincident with naval sonar exercises have involved Cuvier's beaked whales (Ziphius cavirostris). We recorded animal movement and acoustic data on two tagged Ziphius and obtained the first direct measurements of behavioural
Stacy DeRuiter +2 more
exaly +5 more sources
Optimal Waveform Design Using Frequency-Modulated Pulse Trains for Active Sonar [PDF]
Sensors, 2019 Frequency-modulated pulse trains can be applied in active sonar systems to improve the performance of conventional transmitted waveforms. Recently, two pulse trains have been widely researched as the transmitted waveforms for active sonars.
Chengyu Guan, Zemin Zhou, Xinwu Zeng
doaj +3 more sources
Route Optimization for Active Sonar in Underwater Surveillance [PDF]
SensorsMultistatic sonar networks (MSNs) have emerged as a powerful approach for enhancing underwater surveillance capabilities. Different from monostatic sonar systems which use collocated sources and receivers, MSNs consist of spatially distributed and ...
Mehmet Gokhan Metin +2 more
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SCENARIOS FOR BENCHMARKING RANGE-DEPENDENT ACTIVE SONAR PERFORMANCE MODELS [PDF]
VALIDATION OF SONAR PERFORMANCE ASSESSMENT TOOLS 2010, 2023 A set of eight sonar problems, pertaining to man-made active sonar, with source frequencies ranging from 250 Hz to 3.5 kHz, is defined. The scenarios are designed to emphasize range dependent propagation aspects in coastal waters, with the aim of testing
M. Zampolli, Ainslie, P. Schippers
semanticscholar +2 more sources
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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Bi-Sphere Anomaly Detection With Learnable Centroid for Active Sonar Classification
IEEE Access, 2022 Machine learning (ML)-based approaches are desirable for discriminating targets from clutter signals to enhance the performance of active sonar systems.
Geunhwan Kim, Youngmin Choo
doaj +2 more sources