The SubSea Quieter

A disruptive underwater Noise and turbidity Abatement System

A suitable solution for Offshore Foundations & Coastal Works

SubSea Quieter (SSQ) – Advanced Underwater Noise Abatement

The SubSea Quieter (SSQ) reduces the harmful underwater noise and turbidity pollution generated by human maritime activities like coastal and pile driving works. It is also specifically adapted for Offshore Foundations & Coastal Works.

6 times patented, the underwater Noise Abatement System is made with an innovative membrane waved in 3D with a layer of coating providing resistance and waterproofness.

This membrane is used for building inflatable panels. Once inflated, the break in impedance between the water and the introduced air dramatically attenuates sounds. The 3D membrane structure and the specially formulated coating also contribute to this very high acoustic efficiency.

Advantages of the SubSea Quieter

The SubSea Quieter® — technology designed for regulatory compliance and ocean protection, reducing noise pollution and turbidity from all maritime works.

High Performance

Achieves 94–99% reduction in sound pressure levels across critical low- and mid-frequency ranges for marine fauna.

Cost Efficiency

Reduced overall costs for equipment, deployment, and operation compared to current solutions, translating into multi-million-euro savings per wind farm.

Operational Robustness

withstands strong currents, significant swell, and varied depths, with proven reusability over multiple projects.

Ease of Deployment

Compact, modular design enabling faster installation and removal, without requiring additional vessels or heavy equipment.

Adaptability

Six times patented, the system combines a 3D-waved coated membrane with broad foundation compatibility and easy offshore adaptation.

Offshore foundations

SSQ Monopile

  • Monopile diameter: 8 to 12 m
  • Depth targeted: 30 to 70 m

SSQ Jacket

  • Pin Pile diameter: 2 to 4 m
  • Depth targeted: 30 to 70 m

SSQ Pile Anchoring

  • Pile diameter: 2 to 4 m
  • Depth targeted: up tp 300 m and even more

Coastal Works

SSQ Blue Shield

  • For large zone containment
  • Up to 15 m depth, lenght up to 300 m

SSQ Pile Driving

  • For local containment (dolphin pile)
  • Up tp 25 m depth, up to 2.5 m pile diameter

SSQ Pool

  • For barges/ vessels for various dredging and pilling works
  • Up to 20 * 20 * 20 m
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Turnkey solution

Rental-based equipment tailored to each project’s specific requirements, combining budget flexibility with fast deployment.

On-site support

Operational assistance during deployment and recovery, ensuring safety, regulatory compliance, and operational efficiency.

Client-driven adaptation

Dedicated product variants covering all needs, offshore wind, coastal works, designed to meet the technical constraints of each segment.

Compliance and reliability

Integration of acoustic and environmental standards to support regulatory acceptance and accelerate project permitting.

Long-term partnership

Sealence delivers more than equipment – we provide a collaborative framework that secures marine project execution and optimizes performance.