Title :
Underwater ambient noise variability from satellite data-An Indian Ocean perspective
Author :
Nair, Nimmi R. ; Elizabeth Shani, N.X. ; Raju, R.P. ; Satheeshkumar, S.
Author_Institution :
Naval Phys. & Oceanogr. Lab., Minist. of Defense, Kochi, India
Abstract :
Ocean ambient noise level is a function of time, frequency and location. The noise level at different frequency ranges and time spans are contributed by different sources of ambient noise. At low frequencies below 1 kHz, sites near ocean shipping lanes are noisier than other open-ocean locations. Generally, in the range 1 - 50 kHz, sea state dependent noise is dominant. When rain is present, the rain-generated sound usually dominates this frequency band. Several Empirical relations are used to estimate ambient noise on the basis of the source characteristics.
Keywords :
acoustic noise; oceanographic regions; rain; remote sensing; underwater acoustic propagation; wind; AIS traffic data; ASCAT; INSAT-3D; Indian Ocean region; acoustic propagation models; ambient noise characteristics; automatic identification system; continuous spatial coverage; frequency 1 kHz to 50 kHz; local weather disturbance; marine traffic noise; near-ocean shipping lanes; noise variability; ocean ambient noise level estimation; onsite measurements; open-ocean locations; rain information; rain-generated sound; satellite coverage; satellite observation data; satellite sensors; spatiotemporal changes; underwater acoustic systems; underwater ambient noise variability; wind information; Computational modeling; Marine vehicles; Mathematical model; Noise; Noise level; Oceans; Rain; AIS data; Ambient Noise level; Marine traffic noise; Noise Model;
Conference_Titel :
Underwater Technology (UT), 2015 IEEE
Conference_Location :
Chennai
Print_ISBN :
978-1-4799-8299-8
DOI :
10.1109/UT.2015.7108285
