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Range-sensitive Bayesian passive sonar tracking
2010 13th International Conference on Information Fusion, 2010Passive sonar arrays are commonly operated under a far-field assumption in which the only observable parameter regarding target location is the direction of arrival of the target's signal. Range can be observed, but only when a target is in the near-field region of the array.
Brian A. Yocom +2 more
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A new method for processing passive sonar data
2010 13th International Conference on Information Fusion, 2010Processing passive sonar data involves detecting and monitoring tones present in an audio signal. A new method for processing passive sonar data is proposed. The method includes a pre-processing step using Radon and wavelet transforms, which is shown to improve the receiver operating characteristics of the data.
Trevor M. Wood +4 more
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Psychoacoustics and Passive Sonar Detection
1974Abstract : A review is made of the statistical theory of signal detection, followed by application of signal detection theory to psychoacoustics. The differences between relatively simple laboratory tests and the complex problems of passive sonar operating in the real world are explored.
C. B. Leslie, J. M. Stallard
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Range and Bearing Estimation in Passive Sonar
IEEE Transactions on Aerospace and Electronic Systems, 1980Passive sonar systems are used for estimating the range and bearing of signal sources, such as ships or submarines. In this study, the Cramer-Rao bounds on estimation errors are used as measures of the accuracy of the estimates. The bounds show how parameters such as observation time, signal bandwidth, signal-to-noise ratio, and array geometry can be ...
S. Pasupathy, W. Alford
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Active listening in passive-sonar soundscapes
The Journal of the Acoustical Society of America, 2006Listening tasks differ across a variety of dimensions. Tasks that are characteristic of competing channels are those in which command and control signals are delivered simultaneously. Such signals are typically highly uncertain, statistically independent, and nonredundant. Tasks that are characteristic of cooperative channels are those in which sources
Gregory Wakefield, Thomas Santoro
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Passive sonar calibration spheres
The Journal of the Acoustical Society of America, 2001The need for calibrated sonar targets is addressed with the development and testing of a set of thin-walled spheres filled with a high-density fluid. Using historical research information as a guide, a set of thin-walled metal spheres was developed and filled with a high-density fluid.
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Matched array processing for wideband passive sonar
ICASSP '81. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005The Matched Array Processor (MAP) is quadratic adaptive matrix filter designed to optimize detection and bearing estimation of a desired wideband target signature in the presence of interferences. It is made adaptive in the spatial domain to remove interferences entering through the beam sidelobes and it is spectrally matched to the signal of interest.
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Reverse-Time Tracking to Enhance Passive Sonar
2006 9th International Conference on Information Fusion, 2006Passive sonar depends on signals of opportunity to detect, track and localize targets. These signals are typically detected and then tracked using Kalman filter-type signal followers. Target motion analysis (TMA) is then used to estimate the target's range and, from this, its position, course and speed.
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Passive synthetic aperture sonars, revisited
The Journal of the Acoustical Society of America, 1997Experimental and analytical studies have clearly shown the feasibility and applicability of passive and active synthetic aperture sonars (SAS). These investigations have spanned the infrasonic to ultrasonic frequency range. However, passive SAS has not gained widespread use due to three arguments.
Edmund J. Sullivan, William M. Carey
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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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