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Are universal beamformers passive cognitive sonar systems?
The Journal of the Acoustical Society of America, 2022Cognitive sonars dynamically tune system parameters to improve performance in pursuit of specific goals. Most research on cognitive sonar focuses on active sonar, varying the transmitted waveform and ping rate. Although passive sonar also faces the challenges of pursuing goals in varying and unknown environments, little research has been done exploring
John R. Buck +2 more
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Sonar Operator Performance Considerations in Passive Sonar Systems
Proceedings of the Human Factors Society Annual Meeting, 1975Because of rapid developments in passive sonar technology, man-machine interface problems continue to demand human factors studies. This paper discusses display problems, operator variables, and research considerations. Data are presented from a recent study conducted by the authors comparing performance with photographic and static stimulus materials ...
R. J. Hornick +3 more
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Target classification in a passive sonar-an expert system approach
International Conference on Acoustics, Speech, and Signal Processing, 2002A study of passive classification of underwater targets is made. A set of features pertaining to four different classes of vessels are identified, and methods of extraction of these features from the data are outlined. An expert system using Turbo PROLOG is developed for classifying the vessels. The confidence level of the classifier is analyzed. >
R. Rajagopal 0001 +2 more
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Passive fiber optic sonar system
The Journal of the Acoustical Society of America, 1982A fiber optic sonar system wherein first and second optical fibers are wound on a common mandrel and provided with a light energy beam. An acoustic signal differentially varies the index of refraction of the optical fibers to result in an interference pattern dependent upon the frequency of the received acoustic signal or signals.
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Location of Acoustic Beacon with Passive Sonar system : A Comprehensive Analysis
2024 IEEE International Students' Conference on Electrical, Electronics and Computer Science (SCEECS)Lakshmi Sarvani N +5 more
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SPOTLIGHT: a signal-processing system for passive SONAR
The Journal of the Acoustical Society of America, 1977SPOTLIGHT is an integrated signal-processing display system which employs a time-amplitude-frequency orthogonal display and a hidden line-removal technique to reduce clutter and create the appearance of a relief map. The signal processor employs an ideal box-car integrator and overlapped transform methods to allow significant signal-processing gains ...
G. A. Rahe, C. B. Robbins
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Receiver depth selection for passive sonar systems
IEEE Journal of Oceanic Engineering, 1991Since tactical acoustic systems such as towed arrays can be deployed at various depths, the authors address the question of what depth is optimal. This question is considered principally from the point of view of optimum propagation conditions, employing two deep-water scenarios representing summer and winter conditions in the western Mediterranean ...
C. Ferla, M.B. Porter
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Underwater acoustic sensor fault detection for passive sonar systems
2016 First International Workshop on Sensing, Processing and Learning for Intelligent Machines (SPLINE), 2016In this paper, an underwater acoustic sensor fault detection method is proposed that determines whether or not each sensor of multi-channel line array hydrophones malfunctions for passive sonar systems. To this end, the proposed method first measures a short-time root mean square (RMS) value of input signal for each channel.
Yong Guk Kim +5 more
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Novelty Detection in Passive Sonar Systems using Stacked AutoEncoders
2018 International Joint Conference on Neural Networks (IJCNN), 2018Modern military ships have become more silent in the recent years, so that their detection, tracking, and classification have become even more challenging. Submarines rely very much on passive sonar systems, which might operate in a multi-class scenario.
Vinicius dos Santos Mello +2 more
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Enlarging neural class detection capacity in passive sonar systems
2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353), 2003A neural discriminating analysis is used for classifying passive sonar signals. Preprocessed information from the amplitude spectra of the noise radiated from ships is projected onto only a few principal discriminating components for feeding the input nodes of the neural classifier.
William Soares-Filho +2 more
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