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Underwater Noise Pollution Prevention

Sound Attenuation Bubble Curtains

Bubble Curtains are used to reduce underwater noise and vibration in marine and freshwater environments to protect aquatic life during construction

Underwater noise from piling and marine construction can exceed safe thresholds for sensitive species such as salmon, eels and marine mammals.

Bubble Curtains, delivered as a Bubble Tubing® application, provide a proven way to reduce sound propagation in water, creating a protective acoustic barrier during works while allowing works to continue and programmes to stay on track.

Systems are designed using multiple layers of Bubble Curtains, in straight runs, arcs or full enclosures.

With site specific, process-driven specification, Bubble Curtains are proven in the field to enable extension of allowable working windows, delivering cost efficiency and greater certainty around regulatory approval and environmental protection.

  • We work with contractors, regulators, and acoustic consultants to design and deliver Bubble Curtain systems that meet environmental thresholds and protect aquatic life during marine construction.
  • For related needs see our product page about Bubble Curtains for Silt & Debris Control.
  • Book our free 1 hour Technology Briefing on Bubble Tubing and OctoAir applications for your project team.
Key Benefits

Award-winning technology proven to reduce sound and vibration by 99%

Demonstrated noise reduction

Independently verified in live projects, including at South Shields on the River Tyne.

Easy to install

Straightforward and rapid deployment.

Environmental is protected

Protects sensitive species, reduces the risk of harm to fish and aquatic life during piling and marine works and UXO management

Meets compliance and regulatory requirements

Enables programme certainty, supports regulatory approval, reducing downtime and tidal working restrictions

Delivers cost and carbon efficiencies

Reusable equipment and reduced delays lower whole-life project costs

Does not obstruct navigation

Bubble Curtains form a permeable barrier, enabling vessel and wildlife movement during operation

Every Bubble Curtain is designed around site conditions. Key design considerations include:

Scope of project Curtain length, water depth, flows, tidal range, bathymetry, and access
Layout Geometry (linear, arc, enclosure)
Weighted options Additional anchoring and moorings to suit substrate and flow conditions
Compressor We will provide specification including oil-free, energy-optimised units with low noise options
Maintenance Self-purging perforations minimise fouling
Validation Independent validation for sound attenuation applications
Warranty Supplied with a 5-year manufacturing warranty

 

Question?

Frequently asked questions

Got a question about any of our products or services? Check out our FAQs, or give us a call:

Related

Working in water products

The Silt Mats worked perfectly, capturing sediment during excavation works of our new channel creation. We really appreciate your flexibility of getting them to us so swiftly.

Matthew Lyall, Senior Project Officer
Yorkshire Dales Rivers Trust

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“With increasing UK rainfall over recent years, and anticipating potential delays, the site was designed with a rain-ready mitigation system to tackle the inevitable surface water.”

“Water is pumped through a Pipe Reactor where it is treated with Gel Flocculant to reduce settlement time, then into settlement ponds and a final polishing pond, which runs over a series of biodegradable mats to remove any remaining silt.”

Richard Walsh, Senior Project Manager
VolkerStein

“The rain-ready approach of using Silt Mats™, settlement ponds and Silt Capture Channels means the equipment remains in place year-round, ready for use whenever needed. Independent laboratory testing has shown that there is 99% reduction in total suspended solids and up to 99% reduction in iron. This means the water being discharged back into the river actually meets the threshold for drinking water standards.

“VolkerStevin contacted us early on in the process, giving plenty of time for discussion and review before the project’s critical works began. It really emphasises what can be achieved with early engagement towards water management.”

Gavin Beat, Senior Technical Specialist
Frog Environmental

“The key takeaway from this project is that it is possible to manage silt pollution to a very high standard with minimal incidents, even across huge scales, varying ground conditions and extreme weather.

“The Floc Mats proved to be a game changer providing innovative silt management. We are now using them on another overhead line project and look forward to the opportunity to work with Frog Environmental again in the future.”

Colin Mackay, Environmental Sustainability Manager (Scotland)
Balfour Beatty Power Transmission and Distribution

“Frog Environmental were knowledgeable, helping to establish a workable, cost-effective and low maintenance solution for site approved by the regulator.

They really understood the water management issues we had on site and worked with us to develop a solution which works, as well as engaging with our operatives to ensure that they could effectively manage the system.

It was a long regulatory process, but we understand the risks associated with working in such sensitive areas, especially with new and different products and the concerns Stakeholders may have, and they were brilliant in helping provide the necessary data to satisfy Regulator requirements.

We are delighted to have found a solution that prevents pollution and protects the environment, and ultimately allows us to continue with construction.”

Glenn Entwistle, Senior Environmental Advisor
Advance JV

“The Bubble Curtain has been a gamechanger for our rivers network and has become an internal success story. Thanks to the specialist support given by Frog Environmental’s Technical Team in design and planning, we got it right the first time.”

Brett Holmes, Site Agent
BAM Nuttall

The Kex Gill road realignment scheme is a challenging project with multiple environmental risks including management of silt and water quality of the surrounding environment given the locality of designated sites.

Frog Environmental are providing us with extensive technical support, including the design, supply and install of their silt control products on site to ensure the project minimises risks to the watercourses in the project vicinity and prevents impact on highly sensitive aquatic species.

It’s great to be working with them and we’re delighted with the success of the whole project.

Georgina King, Associate Director
RSK Environment

RSK

It’s good to see Frog getting involved with GT at the earliest stages of the project to help with planning out water management in advance of needing it.

Galliford Try

GT

Innovative solutions I’d not considered before.

Jacobs

Jacob

“The results (of the bubble curtain) were quite dramatic – in fact, startling… we have a workable solution that we’ve proved has a dramatic impact on noise propagation.” 

David McLaren, Site Manager – Marine & Civils
John F Hunt Regeneration

testimonial

“Frog Environmental were knowledgeable, helping to establish a workable, cost-effective and low maintenance solution for site approved by the regulator. They really understood the water management issues we had on site and worked with us to develop a solution which works, as well as engaging with our operatives to ensure that they could effectively manage the system.

We are delighted to have found a solution that prevents pollution and protects the environment, and ultimately allows us to continue with construction.”

Glenn Entwistle, Senior Environmental Advisor
Advance JV

1630479036967

“Thanks to Frog’s technical expertise and insight, we have found new ways to tackle these common issues and improve our site water management practices – from company-wide awareness and training to monitoring and prevention. As a consequence, we have made significant cost savings and lowered our carbon emissions.” 

Paul Thomas, Head of Environment
Winvic Construction

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