Passive sonar de-noising for diver detection in presensce of snapping shrimp
conference paper
Since 2010, TNO has conducted a number of experiments on passive diver detection in Dutch waters. We have demonstrated detection, localization and tracking of divers wearing open circuit and closed circuit underwater breathing apparatus as well as boats. However, until now, we have not conducted any such experiments in warm waters. The soundscape in warm, coastal waters can be very different due to complex bathymetry profile, the presence of breaking waves and biological noise. In collaboration with Aruba Ports Authority, TNO conducted a series of measurements to evaluate the feasibility of passive diver detection and harbor protection in such an environment. Although the ambient noise level recorded is lower than in the Netherlands, it is dominated by snapping shrimp noise. These snaps constitute a non-Gaussian background noise, for which conventional signal processing techniques are not suited. In this paper, the effect of the snapping shrimp noise on the correlation, as well as the effect of de-noising techniques applied in the temporal and in the delay domain are demonstrated.
TNO Identifier
508442
Source title
Proceedings 2nd International Conference and Exhibition on Underwater Acoustics, UA2014, 22-27 June, Rhodes, Greece
Editor(s)
Papadakis, J.S.
Bjorno, L.
Bjorno, L.
Pages
825-830
Files
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