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Proceedings Paper

Feature based passive acoustic detection of underwater threats
Author(s): Rustam Stolkin; Alexander Sutin; Sreeram Radhakrishnan; Michael Bruno; Brian Fullerton; Alexander Ekimov; Michael Raftery
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Paper Abstract

Stevens Institute of Technology is performing research aimed at determining the acoustical parameters that are necessary for detecting and classifying underwater threats. This paper specifically addresses the problems of passive acoustic detection of small targets in noisy urban river and harbor environments. We describe experiments to determine the acoustic signatures of these threats and the background acoustic noise. Based on these measurements, we present an algorithm for robustly discriminating threat presence from severe acoustic background noise. Measurements of the target's acoustic radiation signal were conducted in the Hudson River. The acoustic noise in the Hudson River was also recorded for various environmental conditions. A useful discriminating feature can be extracted from the acoustic signal of the threat, calculated by detecting packets of multi-spectral high frequency sound which occur repetitively at low frequency intervals. We use experimental data to show how the feature varies with range between the sensor and the detected underwater threat. We also estimate the effective detection range by evaluating this feature for hydrophone signals, recorded in the river both with and without threat presence.

Paper Details

Date Published: 12 May 2006
PDF: 10 pages
Proc. SPIE 6204, Photonics for Port and Harbor Security II, 620408 (12 May 2006); doi: 10.1117/12.663651
Show Author Affiliations
Rustam Stolkin, Stevens Institute of Technology (United States)
Alexander Sutin, Stevens Institute of Technology (United States)
Sreeram Radhakrishnan, Stevens Institute of Technology (United States)
Michael Bruno, Stevens Institute of Technology (United States)
Brian Fullerton, Stevens Institute of Technology (United States)
Alexander Ekimov, Stevens Institute of Technology (United States)
Michael Raftery, Stevens Institute of Technology (United States)


Published in SPIE Proceedings Vol. 6204:
Photonics for Port and Harbor Security II
Michael J. DeWeert; Theodore T. Saito; Harry L. Guthmuller, Editor(s)

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