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Noise barrier suppliers

We do not have preferred barrier suppliers and do not recommend any particular barrier products. The following list is provided as a guide to the range of barrier types that are available. The acoustics ratings are explained here, and items with an asterisk are estimates only.

Material / Product

Image

Built locations

Acoustics rating

A

B

D

Timber 

Nuibarrier (external link)

Modular engineered plywood wall system.

It can be built over 6 m high.

Manufacturer's test data:
EzyShield 24mm 14kg/m² - STC24
EzyShield 33mm 18kg/m² - STC28

SH20, Maioro Street Interchange, Auckland (2011)

SH18, Greenhithe, Auckland (2007)

A0

 B2*

 D31 (external link)

Woodtex (external link)

Panels composed of woodwool impregnated with rapid hardening cement, under pressure. Manufacturer's test data shows the panels provide sound absorption in the order of 0.6 NRC.

 

A2*

 B2*

 

Rondino Road (external link)

Timber wall system with reflective and absorptive panel options.

Absorptive panel.

Reflective panel.

 

 

 

A3

A0

 

 

B3

B3

 

 
 

 

Concrete

Litecrete Concrete Panels (external link)

Pre-cast concrete.

Modular system, usually with steel support posts. Pumice aggregate and induced air entrainment reduces the weight of panels. Panels are 150mm thick up to a maximum size of 7m x 3.5m.

Mt Hobson Road, Newmarket, Auckland (2010)

A0

 B3*

 

Stahlton (external link)

Pre-cast concrete.

Modular system, usually with steel support posts. Panels can span up to 8 m. Precast concrete panels with 25% recycled concrete. Acoustics test data available from the manufacturer.

SH1, Otahuhu, Auckland (2010)

A0

 B3*

 

Ultrapanel (external link)

Pre-cast concrete.

Modular wall panel. Panels are a mix of cement, limestone, cellulose fibre and additives, with hollow cores to reduce weight. Panels are 300 mm wide and up to 2.2 m long.

No specific noise barrier examples to date, but has been used as a fencing product within NZ

VicRoads (the highway authority for the Australian State of Victoria) has advised that the use of these panels in noise barriers in some VicRoads projects has not been successful

 A0

 B3

 

Hebel AAC Panels (external link)

Pre-cast concrete.

Modular system, usually with steel support posts. Panels made from Autoclaved Aerated Concrete (AAC). 600mm high by 100mm thick panels are stacked horizontally and attached by clip and bolt to support posts.  Panels available up to 6m long and to heights exceeding 4m.

Noise barrier at Martha Mine, Waihi, NZ

A0

 B3*

 

Lifestyle Masonry LM575 (external link)

Pre-cast concrete.

An interlocking barrier system made with Hebel AAC panels that slide down into reinforced concrete or steel posts. Panels are 600mm wide & up to 2.2m long.

Greenlane railway, Auckland

A0

B3*

 

Eco noise barrier (external link)

Pre-cast concrete.

A combination of recycled rubber and concrete precast panels 150mm thick. The recycled tyres provide sound absorption. It is a modular system with steel support posts at 3-5 metre centres.

 

 A2

 B3

 

Enviro Noise Barrier (external link)

Pre-cast concrete.

A combination of recycled timber and concrete precast panels 150mm thick. The recycled timber provides sound absorption. It is a modular system with steel support posts at 3-5 metre centres.

 

 A3

 B3

 

Transparent 

Plexiglas Soundstop (external link)

Acrylic panel. Bird guard product includes 2 mm wide black stripes at 30 mm spacings within panel.

SH1, Victoria Park Tunnel project, Auckland (2011)

A0

 B3

 D41 (external link)

ProCiv (external link)

Lightweight modular aluminium frame with acrylic insert (12-20 mm thick), available in various lengths and heights. Can be provided with cast-in polyamide strips and anti-graffiti coating. Reflective and absorptive panels also available.

Installed in several locations in Europe

A0

B3

 

PSP (EGR) Zenolex® (UV2) Polycarbonate

Noise barrier sheet.

Australian manufactured UV2 polycarbonate panel; can be supplied in clear, transparent and opaque colours.

Projects in Australia A0 B3  

PSP (EGR) ACRYPLEX® / Zenolite® Acrylic Noise Barrier

Australian manufactured acrylic panel; can be supplied in clear, transparent and opaque colours.

Several locations in Australia  A0  B3  

Sonotec (external link)

Acrylic panel. Can be provided with clear, coloured or matt finishes, along with an anti-graffiti coating.

 

A0

 

 

Composite 

Speedwall (external link)

Panels formed from zinc coated steel shell filled with aerated concrete. Modular interlocking panels which can be installed horizontally or vertically.

No specific noise barrier examples, but to date have been used for building sound insulation purposes within NZ e.g. cinemas, apartments

A0

 B3*

 

Plaztuff (external link)

Fabricated plastic noise walls with support columns. Interlocking panels and mounting posts.

No specific noise barrier examples to date, but have been used commercially as an alternative to steel within NZ

A0

 B3*

 

Panelrok (external link)

Sandwich panel consisting of a foam core and two reinforced resin laminated outer skins with steel or concrete support posts.

No specific noise barrier examples to date, but has been used as a fencing product within NZ

A0

 B2*

 

BelAire (external link)

Panels formed from fibre cement skins with polystyrene core. A modular system with panels fitting in slotted steel posts (280 mm wide by 140 mm deep). Composite panels are 70 mm thick, in heights of 900 or 1200 mm and lengths of 2400, 2700 or 3000 mm. Manufacturer's test data: AS 1191-2002.

Residential and commercial sites in the main centres in NZ. Noise barriers for the New South Wales Roads & Traffic Authority

A0

 B2

 

ProCiv (external link)

Lightweight modular aluminium panels available in various lengths and heights. Reflective, absorptive and transparent panel options. Internal rock wool (approximately 40mm thick) for added sound insulation / absorption. Can be provided with anti-graffiti coating.

Absorptive panel.

Reflective panel.

Installed in several locations in Europe

 

 
 
 
 

A4

A0

 

 
 
 
 

B3

B3

 

Sonotec (external link)

Lightweight aluminium panels provide either single or double side sound absorption. Perforation patterns and panel infill material can be varied to suit requirements.

 

A3

B3

 

Other 

Rawe Stoneboxes (external link)

Steel mesh cage filled with rocks, with an acoustic blanket lining. Factory filled and vibrated, double galvanised gabion with an integrated lifting system. 80 mm thick acoustic blanket embedded in the cage.

No specific noise barrier examples to date, but has been used within retaining walls NZ

A0

 B3*

 

Onduline (external link)

Sheets made from recycled paper impregnanted with bitumen, corrugated on one side. A separate timber frame is required. Manufacturer recommends cladding both sides of the frame for acoustics performance.

No specific noise barrier examples to date, but has been used as roofing, wall cladding, fencing within NZ

A0

 B2*

 

1 Data derived from 'Measurements of the Acoustic Performance of Traffic Noise Barriers on Auckland Motorways Using prEN1793-6:2011 [PDF, 4.5 MB]', University of Canterbury, 2012.

Performance ratings

Sound absorption

The 'A' rating is defined in EN 1793-1 and relates to the sound absorbed by a barrier that would be otherwise reflected. In effect, A0/A1 means most sound is reflected, through to A4 which means most sound is absorbed. This can be significant when there are tall parallel barriers facing each other, and sound reflected from the far barrier can pass over the near barrier. The EN 1793 absorption categories are defined in the following table.

Category

DLα

A0

N/A

A1

< 4 dB

A2

4 to 7 dB

A3

8 to 10 dB

A4

> 11 dB

Sound transmission

Laboratory

The 'B' rating is defined in EN 1793-2 and related to the reduction of sound passing through a barrier. B0/B1 means that the barrier is not effectively reducing sound through the barrier, through to B3 which provides the most sound reduction. (The overall performance will also be highly dependent on the barrier height.) These ratings are currently tested in a laboratory under reverberant sound conditions. The EN 1793 sound transmission categories are defined in the following table.

Category

DLR

B0

Not determined

B1

< 15 dB

B2

15 to 24 dB

B3

> 24 dB

Where the DLR performance has not been stated by the manufacturer/supplier, the following process has been use to estimate its value.

  • 1/3 octave band sound reduction index data has been used where available.
  • If the only data available is a single figure Rw/STC, the spectrum has been estimated using Insul software program and scaled to the quoted Rw/STC.
  • If no acoustics value is stated, Insul has been used to estimate the properties, and a 2 dB tolerance subtracted from the performance
  • Where the test has not included a post, this has been modelled with 3 mm wide leakage path running the full height of the barrier, as modelled in Insul using Gomperts' method

Field

The 'D' rating is defined in EN 1793-6 and is a field rating which represents the reduction of sound passing through the barrier actually achieved. The field sound transmission categories are defined in the following table.

Category

DLSI,G

D0

Not determined

D1

< 16 dB

D2

16 to 27 dB

D3

28 to 36 dB

D4

> 36 dB

For further information contact environment@nzta.govt.nz.

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