2025_programme: Ocean noise monitoring tool optimization for deep-sea exploitation

• Day: June 17, Tuesday
    Location / Time: C. THALIA at 09:10 - 09:30
• Last minutes changes: -
• Session: 23. Underwater noise modelling and measurements
  Organiser(s): David Barclay, Martin Siderius
  Chairperson(s): David Barclay, Martin Siderius
• Lecture: Ocean noise monitoring tool optimization for deep-sea exploitation
  Paper ID: 2338
  Author(s): Luciano de Oliveira Júnior, Orlando Camargo Rodríguez, Hugues Chognot, Sérgio Jesus
  Presenter: Luciano de Oliveira Júnior
  Abstract: In the present work we describe the methodologies and achievements towards the development of an ocean sound modeling tool to be used within the EU Horizon project TRIDENT to monitor noise from deep-sea exploitation activities. This includes the strategy used to conjugate the various input data, the optimization and sensitivity tests performed and preliminary validation results. The monitoring tool is based on a ray tracing model fed with marine traffic information from AIS, bathymetry, temperature and wind data from data bases. The model is used to simulate the underwater ambient sound of the surroundings of a likely exploitable seamount. To optimize the run time and assure minimum output discrepancies, we compared simulations from different bathymetry resolution, Nx2D vs 3D, number of vertical beams and maximum range. Preliminary comparisons with field observations from a sparse vertical array and an acoustic glider indicate that the model generally predicts well the dominant level of each 1/3 octave band center frequency. However, the occurrence of such levels can be overestimated by up to 40%. At present, we are dedicated to identifying the main source of differences, that can be due to averaging, processing of observations and also due to hydrophone calibration or self-noise.
• Corresponding author: Mr Luciano de Oliveira Júnior
  Affiliation: LARSyS, University of Algarve
  Country: Portugal