Work program

Activity 01

URNS Platform: design and operate a platform to measure underwater acoustic signatures radiated by ships (led by MTE-OPDAQ)

  • Innovative design of the measurement platform
  • Annual deployment (April) and recovery (November) of the platform
  • Maintenance and calibration (annual)

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Activity 02

Measuring and interpreting acoustic signatures on a representative portion of the maritime traffic (led by ISMER)

  • Near-real-time assessment of the URN signatures of ships according to the ANSI/ASA S12/64-2009 standard (150–200 signatures per year)
  • Analysis of the variability of measured signatures depending on hydrophone configuration
  • Study of radiated noise in relation to the ship's operating parameters
  • Analysis of the multi-source nature of ship noise
  • Assessment the variations of the underwater soundscape recorded at URNS station

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Activity 03

OBAVSI Equipment: design on-board acoustic and vibratory source identification systems (led by IMAR)

  • Developing the measurement methodology
  • Determining the size of the acoustic and vibratory sensor network
  • Manufacturing the system (autonomous and communicating sensor networks)

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Activity 04

Analysis methodology for on-board acoustics and vibratory diagnostics (led by IMAR)

  • Development of an acoustic and vibration diagnostic methodology on board ships
  • Diagnose the vibratory state of partner ships (x16)
    • Install the OBAVSI equipment and perform synchronous measurements with passes by the URNS station
    • Track instrumented vessels over long periods of time to increase the amount of data collected
  • Preparing a general analysis of noise reduction technologies and energy efficiency impacts

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Activity 05

Proposal of methods for reducing radiated noise and measuring their effectiveness (led by ISMER and IMAR)

  • Development of a ship-radiated underwater noise forecasting model fed by on-board acoustic and vibration measurements; validation with URN signatures measured by the URNS station
  • Proposal, implementation, and measurement of the effectiveness of noise reduction methods
  • Studies of side-benefits such as reducing greenhouse gases and reducing on-board noise for workers

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