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
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A risk function for behavioral disruption of Blainville's beaked whales (Mesoplodon densirostris) from mid-frequency active sonar. [PDF]
PLoS ONE, 2014 There is increasing concern about the potential effects of noise pollution on marine life in the world's oceans. For marine mammals, anthropogenic sounds may cause behavioral disruption, and this can be quantified using a risk function that relates sound
David Moretti +10 more
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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
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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
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Active Object Detection in Sonar Images [PDF]
IEEE Access, 2020 Object detection in sonar images has always been a challenge due to the low resolution of sonar images and the strong noise existing in them. Although convolutional neural networks (CNNs) have been applied to detect objects in sonar images, successful ...
Longyu Jiang +4 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
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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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A Variational Bayesian Constrained EKF for Sonar-Based Underwater Target Tracking in Shallow Water [PDF]
SensorsAccurate localization of underwater targets in shallow water is challenging because nonlinear sonar geometry, range-amplified angular errors, uncertain measurement noise, and environmental constraints jointly degrade state estimation. This paper proposes
Hongkun Zhou +5 more
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A thermophone-based FM sonar for airborne ultrasonic sensing under drone flight noise [PDF]
Scientific ReportsBats achieve agile navigation, including obstacle avoidance and prey pursuit in complex environments, using a remarkably simple active sonar system consisting of a single sound emitter and two receivers.
Yasufumi Yamada +5 more
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