SubSea Quieter

The SubSea Quieter system is made of 3 elements :

  • A complex multi-layer membrane
  • An anchoring system
  • An automatic system to manage air pressure inside each membrane panel

The SubSea Quiter membrane base is a technical fabric, which is made up of different types of materials woven overlaid with a coating mixture of elastomer materials and a waterproof sealing foil.

Each SubSea Quieter panel is filled with air that can emptied or filled to manage coastal works activity phases, tidal range, currents and storms and allow vessel traffic. 

The SubSea Quieter production method and operating principle have been protected by two patents.

PERFORMANCES

  • Ambitious targeted acoustic mitigation compared to other solutions: 15 to 20dB for low frequencies, meaning sound power level reduced from 30 to 100 times, and up to 35dB for higher ones.
  • Unique efficient solution against both turbidity and noise
  • Efficient solution even with tides, storms and currents
  • Easy-to-use and disruptive solution designed for and with end users (design thinking)
  • Durability
  • Climatic hazard and vessel traffic management without unsafe human interventions

TECHNOLOGY READINESS LEVEL

  • TRL at the end of 2017 : 5/6
  • Technology developed by Naval Group’s underwater acoustic experts
  • Technology protected by 2 patents
  • First prototype tested in real conditions in Norway with NTNU Trondheim University in summer 2017
  • Targeted TRL for the end of 2021 : 9

A technology tested in Norway

In the summer 2017, a first version of the SubSeaQuieter has been tested in Norway.

These tests were run in collaboration with Marmine.

On the graph, you can see the noise levels registered during these tests

without (left) or with (right) the membrane.