+44 330 123 1760 exportsales@sigplc.com

Acoustic and Vibration Solutions

Introduction

SIG Export can supply acoustic insulation and vibration control materials and systems worldwide.

Our solutions have been tested to rigorous British and European standards and fabricated in accordance with stringent quality standards.

Our acoustic materials include resilient layers and cradle and batten systems to be used in flooring applications; sound absorption boards and acoustical plasters to control reverberation issues in schools, call centres and offices; and a wide range of acoustic barriers, linings and laggings for industrial and M&E applications.

Our anti-vibration offering includes structural and foundation isolation, vibration isolation for industrial and M&E environments and precision equipment isolation.

Acoustic Product Portfolio

Acoustic Wall Solutions

  • Sound Absorption Panels
  • High-Impact Sound Absorption Panels
  • Soundproofing Wall Panels
  • Acoustic Isolation Clips
  • Acoustic Isolation Strips
  • Spray-On Acoustical Plaster

Acoustic Floor Solutions

  • Acoustic Resilient Battens
  • Acoustic Cradle and Batten Systems
  • Acoustic Resilient Overlay Boards
  • Under-Screed Acoustic Insulation
  • Resilient Acoustic Floor Coverings
  • Floating Floor Systems

Acoustic Ceiling Solutions

  • Acoustic Ceiling Products
  • Acoustic Ceiling Tiles
  • Suspended Sound Absorbers
  • High-Impact Grid System
  • Suspended Acoustic Cubes
  • Acoustic Ceiling Baffles
  • Spray-On Acoustical Plaster System
  • Through-Floor Acoustic Floor/Ceiling System

Industrial Acoustic Solutions

  • Acoustic Enclosure Panels
  • Acoustic Barriers and Damping Sheets
  • Acoustic Wall Linings
  • Acoustic Duct Linings and Laggings

Our acoustic product portfolio is extensive, with a robust and reliable supply chain. If you don’t see the precise product you need for your project, please contact us: +44 330 123 1760 or exportsales@sigplc.com. We will do everything we can to help.

Anti-Vibration Product Portfolio

Structural/Foundation Isolation Solutions

  • Building Isolation
  • Trackbed Isolation
  • Structural Bearings
  • Machine Foundation Isolation
  • Steelwork Isolation Pads

Vibration Isolation Solutions for M&E

  • Spring Isolators
  • Vibration Isolation Materials
  • Neoprene Mounts
  • Isolation Hangers
  • Inertia Bases
  • Isolation Collars
  • Flexible Connectors
  • Leveling Mounts

Industrial Noise and Vibration Solutions

  • Curtain Enclosures
  • Sound Absorbers
  • Noise Barrier Materials
  • Spring Dampers
  • Spring Hangers
  • Anti-Vibration Pads

Precision Equipment Isolation

  • Electron Microscope Solutions
  • Coordinate Measuring Machine Solutions
  • Nontechnology Labaratory Solutions
  • MRI Machine Solutions
  • Micro Hardness Tester Solutions
  • Scanning Probe Microscope Solutions

Building Solutions

  • Floating Floors
  • Resilient Hangers
  • Wall Isolation Clips
  • Wall and Partition Isolation Clips
  • Thrust Restraints

Our acoustic product portfolio is extensive, with a robust and reliable supply chain. If you don’t see the precise product you need for your project, please contact us: +44 330 123 1760 or exportsales@sigplc.com. We will do everything we can to help.

Acoustic Product Spotlight

Acoustic Leveling Saddle System for Uneven Concrete Floors

Acoustic Saddle System

Saddle Flooring Systems are patented dry floating floors which provide an easily leveled under-structure for supporting chipboard plywood and hardwood flooring, and contribute significantly to the reduction of impact and airborne sound through party floors.

They can be used in domestic and commercial applications and can also contribute significantly to the acoustic performance of floors.The unique innovative packing system provides an easy and accurate method of leveling a timber floating floor over an uneven subfloor.

Advantages

  • Quick and easy leveling of uneven floors
  • Effective reduction of impact and airborne sound
  • Eliminates wet trades
  • Weight saving compared to screeds can reduce foundation costs
  • Provides void for services insulation or underfloor heating

Applications

  • Ground floors
  • Acoustic separating concrete floors
  • In Robust Detail floors as an FFT 2 floating floor
  • Sports floors
  • Supporting hardwood flooring
  • Accommodating underfloor heating systems
  • Dance floors and rehearsal spaces
  • Commercial applications
  • Office floors (light duty)
  • For applications with loading greater than a UDL of 1.5kN/m2 and Concentrated load of 1.4kN please contact SIG Export for advice about board capacity and recommended component centres.

Acoustic Floor for Leveling Concrete

The system comprises:

Acoustic Saddles

Saddles are 97mm x 97mm square and have a tough , injection moulded plastic headcap adhered to a high performance, recycled foam resilient layer.The headcap holds the Support Bearers to which flooring panels are fixed. The Saddles are available in three headcap heights (small, medium and large). The small Saddle permits 14mm of packing, the medium – 29mm and the large – 40mm. The different headcap heights maximise the packing of the appropriate Support Bearer. Each headcap has two small holes in the surface to lock packing pieces in place.The ingenious design of the headcap means that it can also support cross noggins for access panels or perimeter bearers. The standard height of the Saddle with the resilient layer attached is 11mm.

Support Bearers

Softwood Support Bearers are placed within the Saddles to support flooring panels. They are 45mm wide and generally supplied in 2400mm lengths for ease of handling. They are available in 37mm, 45mm, 52mm and 61mm heights as standard.

Colour Coded Packers

Packing is provided by means of innovative self locating plastic packers which are made in 3,4,5 and 10mm thicknesses.The unique , patented packers interlock with each other and with the Saddle to achieve the levelling of uneven subfloors.

`L` Shaped Flanking Strips

6mm thick ,preformed `L` shaped acoustic foam supplied in strips 1.8m long packed in bags containing 100m. The innovative `L` shape makes it easy to fit and one size fits all floors. It is lightly trapped between the bottom of the skirting and the flooring board with the excess neatly trimmed off.

Elevating Block (Optional)

Elevating blocks are made from injection moulded plastic and they can be placed in combination below saddles where floor variations are extreme up to a maximum height of 150mm. They interlock with the Saddles and with each other and extend the height of systems to cope with major deviations in levels.The blocks come in 15mm and 30mm thicknesses.As the resilient layer remains on the base of the saddle in use , the overall acoustic performance is not impaired. Elevating blocks can also be used to raise the system to allow services to run in both directions under Support Bearers.

Anti-Vibration Product Spotlight

Steel Work Isolation Pads

Steelwork Isolation Pads for Vibration Isolation

Steelwork and Vibration Issues

There are considerable advantages to using steel in construction. It’s strong, lightweight and durable. It’s little wonder it’s the go-to material for modern construction, particularly of larger, city-based buildings. The one thing it is very poor at, however, is vibration isolation. Vibrations travel through steel with ruthless efficiency. Furthermore, many steel frame buildings are constructed in locations where vibration is a significant issue, with busy main roads and railway lines in close proximity.

Steelwork isolation pads offer a simple yet highly effective solution. They can be employed either to separate a steel joist from the attached joist or to isolate an entire structure from the slab.

Treating Vibration in Steelwork

When selecting steelwork isolation pads, it isn’t simply a case of finding an elastomeric material which can withstand the physical strain demanded of it, although this is, of course, a crucial factor. The other equally important (and, perhaps, more important) factor is the natural frequency of the material used.

The natural frequency of a material is the frequency at which it vibrates if struck or if ‘disturbed’ by sound or other vibrations. If the material’s natural frequency is too similar to the frequency of the problem vibration, resonance can result which can actually exaggerate rather than resolve a vibration problem.

Our Product Range

Our range of Polyurethane foam and Polyurethane-Bound Rubber Granulate materials offer a Load Range of 0.010 to 1.5 N/mm2 and a Natural Frequency of 8-121Hz.

We also offer Isolation Collars, designed specifically to isolate mechanical fixings from transferring noise and vibration into the surrounding structure.

Acoustic Case Study

An Acoustic Solution for Dangerous Noise

Soundproofing at Power Station

The noise recorded coming from the dry cooling system at the Severn Power CCGT Power Station at Uskmouth B was 130dB-135dB, a full 50dB above the acceptable levels described in the Noise at Work Regulations.

To make matters worse, the noise generated had a very low-frequency bias. Low-frequency noise is the most difficult to treat from a soundproofing perspective due to the excessive  length of the wave cycle.

Solutions for low-frequency noise issues typically involve wrapping the problem in significant quantities of acoustic insulation, with many standard solutions being as deep as 500mm to 700mm. The sheer volume of lagging required for an insulation-based approach to a project like Uskmouth, with a daunting 8,000m2 of ducting to be covered, would be expensive, time-consuming to install and prohibitively disruptive.

What’s more, there were areas around the ducting at Uskmouth which simply wouldn’t have been able to accommodate such an excessive construction height of soundproofing material.

Paul Absolon, Technical Director, responded to the challenge of creating a ‘thinner’ soundproofing system that would meet the necessary Noise at Work Regulations requirements but would be cost-effective and efficient to install.

In order to minimise disruption to Uskmouth, an off-site simulation was created near Burton on Trent, using a large section of identical ducting with a ‘door’ sealing up either end. Within the duct were several very powerful speakers. For testing, highly sensitive microphones were placed in strategic positions along the outside of the duct to measure any ‘leakage’. Acoustic insulation solutions were conceived, implemented and assessed in this controlled environment.

Off-Site Acoustic Simulation

Exploring a wide range of acoustic materials from SIG’s industrial acoustics range, it was clear that a single product was not going to be able to solve the problem on its own, so Paul opted for a combination of products working in concert, layer upon layer.

The first layer consisted of CMS HT1B elastomeric isolation pads, constructed from a polyurethane-bound rubber granulate specifically formulated to dampen and/or isolate noise and vibrations at source and independently tested by the Institute of Structural Dynamics at the Technical University of Dresden.

The 50mm thick pads were bonded to the surface of the duct at a rate of nine per square meter, creating 300mm spacings; so, as well as the dampening effects of the material itself, the construction benefited from large, evenly distributed airspaces in its foundations. Sound waves move less effectively through dead air.

The second layer consisted of 50mm-thick QuietSlab SVX3, a high-performance, mineral-fibre acoustic lagging. MIMA (the Mineral Wool Insulation Manufacturers Association) describe the acoustic insulation properties of mineral wool (and mineral fibres more generally): “Porous materials such as mineral wool work to control and reduce noise by allowing air movement into the fabric of the material. The fluctuations of air molecules – which form sound waves – move into the body of the mineral wool, where friction between the air particles and the material’s narrow airways cause sound energy to be dissipated as heat.”

The third layer comprised CMS WBBKT Acoustic Barrier, a high-density, barium-sulphate-loaded thermoplastic polymer, which is thin, flexible and easy to work with. Whereas the QuietSlab SVX3 layer is designed to absorb and dissipate noise, this dense acoustic barrier is designed to resist the passage of noise and is particularly adept at preventing the passage of low-frequency noise.

The forth layer duplicated the second. The fifth layer duplicated the third. The sixth and final layer consisted of a corrosion-resistant Aluzinc casing.

Acoustic Solution for Ductwork

By alternating between thick noise-absorbent layers and thin-but-dense noise-resistant layers, Paul was able to create a soundproofing solution with a depth of just 170mm – between 66% and 76% thinner than a 500mm to 700mm standard solution. However, the successful reduction of the construction height would mean nothing at all if it failed to deliver the necessary levels of noise reduction. The proof would be in the testing.

Personnel from Siemens attended the test. They were standing in relatively close proximity to the simulated duct whilst technicians from Muller-BBM set up their equipment. As always with these situations, there were delays, so the Siemens team were standing around for quite some time. Naturally, they were a little impatient and asked when the test was going to commence. They were told the test had been running for the last 10 minutes. The speakers within the ducts had been generating noise levels of 130-140dB and no-one had noticed. Only when the lagging protecting the ‘door’ to the duct was removed could the true extent of the racket within be appreciated.

The testing, once complete, revealed that Paul’s solution had reduced the noise generated by 39%, to just 82-83dB(A), under the 85dB required by the Noise at Work Regulations.

Peter Ullrich, project director at Siemens Energy, commented: “Effectively controlling noise and reducing sound emissions was a top priority for us in the Uskmouth project. Not only was it essential that the dry cooling system satisfied all the legal acoustic obligations and regulations but just as important was that neighbouring properties were not disturbed by additional noise levels.”

Paul Absolon said, “It was a real challenge working on the Uskmouth project, the kind of challenge we relish. We avoid a one-size-fits-all approach, taking a fresh approach to each project. This ethos has seen us apply our knowledge and experience to everything from schools, theatres and churches to oil rigs, refineries and, now, power stations.”

Anti-Vibration Case Study

Vibration Isolation for a Cement Mill in Abu Dhabi

Vibration Isolation for a Cement Mill

In brief

A laboratory-tested, granular rubber antivibration material was specified as a foundation isolation solution at Abu Dhabi Cement Mills – a turnkey grinding plant in the United Arab Emirates.

Project scope

The Cement Mills was constructed for a capacity of 115 tonnes/h (grinding of OPC with a fineness of 3300 Blaine). It also has to produce cement of an even higher fineness (up to 4800 Blaine) or slag of a very fine grain size (4400 Blaine).

Appropriate anti vibration materials were needed to prevent structural damage, nuisance noise and poor quality grinding. These factors are caused by powerful internal machine forces producing severe vibration and shock when grinding cement. According to the modal analysis, CEMTEC was required to meet a natural frequency of 11 Hz.

Diagram of cement mill

The granular rubber antivibration material was incorporated into the design of the cement mills to isolate the foundations of the grinding plant, measuring 22.3m x 14.3m x 4.5m. To achieve greater deflection and a lower natural frequency, the material was installed in four laminated layers, with each layer running 90° to the other.

Benefits

  • High performing product with long and maintenance free lifespan
  • Cost effective
  • Polyurethane (PUR) bound rubber granulate material
  • Standard material thickness of 15mm
  • Environmentally friendly and fully recyclable
  • Supplied in rolls, pads or strips to suit exact installation requirements
  • Can withstand loads of up to 25 tonnes/m2
  • Minimal creep

Effectively controlling noise and reducing sound emissions was a top priority for us. It was essential that the dry cooling system satisfied all the legal acoustic obligations and regulations.

Peter Ullrich

Project Director, Siemens Energy

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