Monitoring of moving surface ship using a four-element planar hydrophone array installed on the seabed

Abstract

This talk presents the analysis result of underwater sound measurement data which were recently gathered in the shallow water near South Korea. For the underwater sound measurement, a four-element planar hydrophone array developed by KRISO was installed on the seabed and recorded a month-long acoustic data. The result shows that the measured sound level is usually higher in the morning time and this is ascribed to the surface boats which are presumably in fishing activity. We deal with the identification of the sound sources via various modulation analysis methods which can discriminate the sound induced by rotating propellers and also discuss the direction finding by beamforming of the planar hydrophone array data. [This work was financially supported by the research project PNS3120 funded by KIGAM.]