1. No category

Megasorber Pty Ltd ACN 096 454 278
ABN 43 724 743 98
Reducing Reverberation (or Echo) Noise
Engineering Recommendations
Buildings with sound reflective surfaces tend to have reverberation noise issues. These typical
sound reflective surfaces are polished floorboards, plasterboard walls, plasterboard ceilings,
insulated panels (such as Bondor or Kingspan panels), glass walls and so on.
Megasorber P and Megasorber FG are fireproof sound absorbing panels for architectural
acoustics. These acoustic panels have a patented fireproof sound absorbing layer Soundmesh
G8 (U.S. Patent No. 8167085, Australia Patent No. 2009206197). Soundmesh G8 is a unique
acoustic layer that achieves the Building Code Australia (BCA) Group 1 Fire Classification and
ISO 5660 Group 1 Fire Classification. Combined with thermally bonded polyester, Megasorber
P has BCA (Building Code of Australia) Group 2 Classification with Average Specific Extinction
Area less than 250 m2/kg.
Please click on the video link below to hear how Megasorber sound absorption materials have
effectively reduced the reverberation (or echo) noise:
http://www.megasorber.com/soundproofing-solutions/building.html.
These recommendations provide guidance to suit various requirements and budgets.
1.
2.
3.
4.
The best option:
Second best option:
Economic option:
Budget cost option:
Megasorber P100 or Megasorber FG100
Megasorber P50 or Megasorber FG50
Megasorber P25 or Megasorber FG25
Megasorber PN8
Key features of Soundmesh G8 are as follows:

Fireproof: The photos show that Soundmesh G8 will not burn nor melt after being exposed
to naked flame. It also prevents the foam behind it from burning by cutting out the fire.
(1) Exposed to naked flame
(2) No burning or melting (3) Block out the fire
Fig. 1. Soundmesh G8 after being exposed to naked flame.
Soundmesh G8 has a Building Code Australia (BCA) Group 1 Fire Classification (AS/NSZ
3837 Group 1 fire rating). It also has ISO5660 Group 1 fire classification.
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
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Megasorber Pty Ltd ACN 096 454 278

ABN 43 724 743 98
The unique sound absorption mechanism:
Sound wave
Megasorber Soundmesh G8
Solid substrates such as wall or ceiling
Soundmesh G8 is a smart material with a solid membrane in appearance, but has a
‘microporous’ design to allow noise to filter through. Whilst allowing noise through,
Soundmesh G8 breaks down the sound waves and traps the noise inside. This noise
energy is then dissipated by the foam or polyester behind the Soundmesh G8. The figure
below shows how the sound is absorbed by this smart material.
Blocks out fire
Fig. 2. Sound absorption mechanism of Soundmesh G8
Traditional fireproof faced materials and sound reflecting film facings (such as aluminum foil,
mylar film and polyurethane film) have little or zero acoustic properties and block noise from
being absorbed by the underlying substrate. In contrast, Soundmesh® G8 has been
engineered and tuned to maximize sound absorption. The independent test results reveals
that the Soundmesh G8 boosts the acoustic performance of 25mm thick foam from NRC
(noise reduction coefficient) of 0.55 to NRC of 0.85.
Sound Absorption of 25mm Thick Foam With and Without Soundmesh G8
(Tested to AS ISO 354-2006 Acoustics: Measurement of sound absorption in a reverberation room)
1.3
Sound Absorption Co-efficient
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
With Megasorber Soundmesh G8, NRC = 0.85
Without Megasorber Soundmesh G8, NRC = 0.55
0.3
0.2
RMIT University Test Report: 121I/11-169/PD
RMIT University Test Report: 121I/11-174/PD
0.1
0.0
80
100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000
Frequency (Hz)
Fig. 3. Sound absorption coefficient of 25mm thick foam with and without Soundmesh G8 facing.
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
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Megasorber Pty Ltd ACN 096 454 278

ABN 43 724 743 98
Fluid splash resistant:
Soundmesh G8 protects the acoustic foam from dust contamination, fluid splash and so on.
Water repellent version of Soundmesh G8 is also available.
Fig. 4. Water repellent Soundmesh G8 facing.


Extremely tough and durable:
It is widely used to replace perforated metal as a protective facing.
High temperature resistance:
It can stand up to 550°C continuously.
Megasorber P and Megasorber FG range products:
Megasorber P: semi-rigid acoustic polyester panel with Soundmesh G8 facing;
The key features are:
 BCA (Building Code of Australia) Group 2 Classification with Average Specific Extinction
Area less than 250 m2/kg.
 Tough, durable and water repellent (optional) facing;
 Environmentally friendly with 100% recyclable acoustic polyester wool;
 Long service life i.e., will not deteriorate when exposed to hot and humid conditions.
 Easy to install
Fig. 5. Megasorber P Series with black, white, sandstone and grey colour Soundmesh G8 facing
Sound Absorption of Megasorber P Series Products
(Tested to AS ISO 354-2006 Acoustics: Measurement of sound absorption in a reverberation room)
1.3
1.2
Sound Absorption Co-efficient
1.1
1.0
0.9
0.8
0.7
0.6
0.5
Megasorber P100, NRC = 1.10
0.4
Megasorber P50, NRC = 1.01
0.3
Megasorber P25, NRC = 0.82
0.2
RMIT University Test Report: 121I/09-073/PD
RMIT University Test Report: 121I/11-167/PD
RMIT University Test Report: 121I/11-168/PD
0.1
0.0
80
100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000
Frequency (Hz)
Fig. 6. Sound absorption coefficient of Megasorber P range products.
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
Page 3 of 10
Megasorber Pty Ltd ACN 096 454 278
ABN 43 724 743 98
Megasorber FG: light weight acoustic foam panel with Soundmesh G8 facing; It is designed
for applications where it is required to be light weight and easy to install.
The key features are:
 Extremely light weight;
 Easy to cut and install
Fig. 7. Megasorber FG with grey, white, sandstone and black colour Soundmesh G8 facing
Sound Absorption of Megasorber FG Products
(Tested to AS ISO 354-2006 Acoustics: Measurement of sound absorption in a reverberation room)
1.3
Sound Absorption Co-efficient
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
Megasorber FG100, NRC = 1.04
0.4
Megasorber FG50, NRC = 1.01
0.3
Megasorber FG25, NRC = 0.85
0.2
RMIT University Test Report: 121I/11-169/PD
RMIT University Test Report: 121I/11-171/PD
RMIT University Test Report: 121I/11-173/PD
0.1
0.0
80
100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000
Frequency (Hz)
Fig. 8. Sound absorption coefficient of Megasorber FG100, FG50 and FG25
(1) The best option: Megasorber P100 or Megasorber FG100
Thickness: 100mm
Megasorber FG100 and P100 are both extremely absorbent over the whole frequency
range, with high NRC. The key feature is that both have exceptional high sound absorption
at low frequencies, with a peak sound absorption at around 250Hz to 500Hz.
(2) Second best option: Megasorber P50 or Megasorber FG50
Thickness: 50mm
Megasorber FG50 and P50 are very effective sound absorption materials, with extremely
high NRC. The key feature is that both have high sound absorption at low to mid
frequencies, with a peak sound absorption at around 500Hz, making them the most
effective materials to reduce the reverberation noise in stadiums, classrooms, restaurants
and meeting rooms.
(3) Economic option: Megasorber P25 or Megasorber FG25
Thickness: 25mm
Megasorber FG25 and P25 are very effective sound absorption materials for mid to high
frequencies, with a peak sound absorption at around 1,000Hz.
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
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Megasorber Pty Ltd ACN 096 454 278
ABN 43 724 743 98
(4) Budget cost option: Megasorber PN8
Thickness: 8mm
Megasorber PN8 is 8mm thick acoustic polyester panels with Soundmesh G8 facing. Lining
the wall and ceiling with PN8 will convert the reflective surface to an absorptive surface,
reducing the echo in the room. Much higher sound absorption can be achieved when PN8
is applied with an air-gap behind it. The tests are shown below on Megasorber PN8, with
no air-gap, 90mm air-gap and 90mm air-gap plus 12mm thick perforated MDF board with
10.2% open area. These results show Megasorber PN8 as one of the most cost effective
solutions to reduce reverberation noise.
Fig. 9. Megasorber PN Series with sandstone, grey, white, and black Soundmesh G8 facing
Sound Absorption of Megasorber PN8BK
(Tested to AS ISO 354-2006 Acoustics: Measurement of sound absorption in a reverberation room)
Sound Absorption Co-efficient
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
RMIT University Test Report: 13-052
RMIT University Test Report: 13-051A
RMIT University Test Report: 13-048
0.2
0.1
0.0
100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000
Frequency (Hz)
Megasorber PN8BK, with 90mm Air-gap, NRC = 0.80
Megasorber PN8BK, with 90mm Air-gap, 12mm thick Perforated MDF Board (10.2% OA), NRC = 0.70
Megasorber PN8BK, no Air-gap, NRC = 0.30
Fig. 10. Sound absorption coefficient of Megasorber PN8BK with and without an air-gap.
Typical installation methods and finishes for various applications:
1. Express finish (with 20mm gap and no trim):
Megasorber A100 spray-on adhesive (or Megasorber A200 cartridge adhesive) is recommended to
adhere the panels onto the walls and ceiling. Photos below show the installation process.

Installing Megasorber P50GR onto the walls and ceiling with express finish:
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
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Megasorber Pty Ltd ACN 096 454 278
(1) Application of adhesive
(2) Installing the panel
ABN 43 724 743 98
(3) Finish

Installing Megasorber P50WR-WH onto the ceiling with express finish:

Megasorber FG50WR-SS onto the ceiling and walls with express finish in a Scout Hall

Megasorber FG100WR-SS onto the walls on a Church Hall:
2. Megasorber Suspended Ceiling System using a unique Megasorber Uhat
A Schematic Drawing of Megasorber Suspended Ceiling System
with Megasorber P50WR-WH(GP)
Suspension Rod
Megasorber Uhat
Megasorber A200
Megasorber P50
Supporting T bars
Megasorber P50WR-WH(GP)
One of the typical finishes of the system
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
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Megasorber Pty Ltd ACN 096 454 278
ABN 43 724 743 98
3. Panels installed on concrete soffit slab, plasterboard or Bondor panel ceiling with
Megasorber Uhat finish:
A Schematic Drawing of Megasorber Acoustic Ceiling System
Structural slab, Plasterboard, Bondor or Kingspan Panel
Megasorber Uhat
Megasorber A100 Adhesive
Megasorber FG50 or P50
Megasorber P50WR-WH(GP)
One of the typical finishes of the system
4. Megasorber panels installed directly onto concrete soffit with Megasorber A200 and concrete
pins:
Megasorber P and FG panels are designed to be installed onto the concrete soffit directly.
Best option: Megasorber A200 (cartridge) with concrete pins are recommended. A typical
mechanical fastening system is shown below:
Powder-actuated Tool
Pin
A Schematic Drawing of Megasorber Acoustic Ceiling System
with Megasorber P50WR-WH(GP) on Concrete Soffit
Megasorber P50BK on ceiling and wall with pin
A schematic drawing of Megasorber A200 Application and Concrete Pin
Concrete slab
Megasorber P50
Megasorber A200
Megasorber A200 Adhesive
Concrete Pin
50mm Concrete Pin
Megasorber P50WR-WH(GP)
Colour Matching Soundmesh G8 Tape (Optional)
Megasorber P50WR-WH(GP)
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
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Megasorber Pty Ltd ACN 096 454 278
ABN 43 724 743 98
Economic option: Megasorber A200 (cartridge). A typical mechanical fastening system is shown
below:
A Schematic Drawing of Megasorber Acoustic Ceiling System
with Megasorber P50WR-WH(GP) on Concrete Soffit
A schematic drawing of Megasorber A200 Application
Concrete slab
Megasorber P50
Megasorber A200
Megasorber A200 Adhesive
Megasorber P50WR-WH(GP)
Colour Matching Soundmesh G8 Tape (Optional)
Megasorber P50WR-WH(GP)

Megasorber P100BK and P100GR onto the concrete slab ceiling with pins, Queensland University
Advanced Engineering Building:
5. With wooden batten finish:

Megasorber acoustic panels are adhered onto the substrates, such as concrete soffit, with
Megasorber A200 (or A100 spray-on) adhesive. Wooden battens are used along the edges. A
typical finish is shown below:
Megasorber P50GR with wooden batten finish, ABC TV Studio Brisbane Headquarters:

Megasorber P100BK (black colour) for school multi-purpose hall noise reduction.
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
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Megasorber Pty Ltd ACN 096 454 278
6.
With aluminium trim finish:

Shadow line with aluminium trim:

With aluminium channel finish:
ABN 43 724 743 98
Recommendation for noise reduction of swimming pools and aquatic centres:
Megasorber P50WR-WH(GP) is recommended.
Details are as follows:
Product code: Megasorber P50WR-WH(GP)
50mm thick acoustic polyester panels (grey) with a water repellent, fireproof and sound
absorbing Soundmesh G8 facing (white);
The key advantages are as follows:

Water repellent Soundmesh G8 facing to prevent water getting into the material;

The thermally bonded polyester wool is suitable for wet and humid environment;

Environmentally friendly: the polyester wool is 100% recyclable;

High sound absorption capacity with NRC (Noise Reduction Coefficient) of 1.01.
Fig. 11. Megasorber P50WR-WH(GP)and the water repellent facing
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
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Megasorber Pty Ltd ACN 096 454 278
ABN 43 724 743 98
Fig. 12. Megasorber P50WR-WH(GP) installed on the ceiling of Broadmeadow Aquatic Centre, Broadmeadow, Melbourne;
The above is for general guidance only. Please contact us for a customised solution. If you
require further information, please visit our website www.megasorber.com or contact us.
Dr. Harvey Law
Megasorber Pty Ltd
E-mail:
[email protected]
Phone:
(03) 9857 0208;
Mobile:
0407 088 880;
Fax:
(03) 9857 0298
Website:
www.megasorber.com
Important notice and disclaimer:
Specifications are subject to change without notice. Please contact us for the latest version.
"Fireproof", "Non-flammable", "Non-combustible" means the product has successfully passed AS/NZS 3837, IS0 5660-1, ASTM E1354 Group
1 fire rating (AWTA test report No. 7-566397-CV).
Patent applied for Soundmesh G8 (U.S. Patent No. 8167085, Australian Patent No. 2009206197). The data listed in this data sheet are typical
or average values based on tests conducted by independent laboratories or by the manufacturer. They are indicative only of the results
obtained in such tests and should not be considered as guaranteed maximums or minimums. Materials and installation methods must be
tested under actual service to determine their suitability for a particular purpose. “Aussie engineered and made” means the products are
engineered and made in Australia with globally sourced materials.
This document and the ideas expressed herein are the sole property of Megasorber Pty Ltd
© Copyright
Building 1, 25 Chapman Street, Blackburn North, Victoria 3130, Australia Tel: (03) 9857 0208 Fax: (03) 9857 0298 E-mail: [email protected]; Website: www.megasorber.com
File: F:\Marketing\Reverbration (Echo) Noise Reduction - Rev5.doc
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