2019_programme: ENVIRONMENTAL DEPENDANCE OF UNDERWATER AMBIENT NOISE SPATIAL AND TEMPORAL COHERENCE AT BASIN SCALE

• Session: 14. Environmental acoustics and noise
  Organiser(s): Barclay David
• Lecture: ENVIRONMENTAL DEPENDANCE OF UNDERWATER AMBIENT NOISE SPATIAL AND TEMPORAL COHERENCE AT BASIN SCALE [invited]
  Paper ID: 960
  Author(s): Kinda G. Bazile, Le Courtois Florent, Boutonnier Jean-Michel, Stéphan Yann, Royer Jean-Yves, Barruol Guilhem
  Presenter: Kinda G. Bazile
  Presentation type: oral
  Abstract: Underwater soundscape is generally described as a complex combination of sounds from a variety of acoustic sources, whether from natural (biological, geophysical, meteorological) or from human origin. Depending on the sources-receivers distances, the received signal maybe be shaped by the acoustic response of a complex continuously fluctuating marine environnment. This property, combined with all the sources involved, gives ocean noise an intrinsic characteristic of the marine environment in which it is measured. Therefore, the study of the spatio-temporal structure of the ocean noise from a hydrophone network make it possible to infer the physical characteristics of the marine environment as well as the sources involved.\n\nSpatial and temporal coherences of low frequency underwater ambient noise in the Indian Ocean basin is investigated in this study. This coherence is examined taking into account the physical properties of the marine environment (temperature, salinity) as well as the meteorological variables. The data under consideration combine year round acoustic recordings from two recoding systems: on the one hand, data were from ~50 Ocean Bottom Seismometers (OBS) arranged in a network as large as 2000 km x 2000 km (http://www.rhum-rum.net/); and on the other hand acoustic data from hydrophones in the SOFAR channel.
• Corresponding author: Dr Kinda G. Bazilz
  Affiliation: Service hydrographique et océanographique de la marine (SHOM)
  Country: France
  e-mail: