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Noise protection technology

As a manufacturer of noise barriers, we are always one step ahead in terms of quality, flexibility and price. Noise barriers “Made in Germany”.

The structure: the inner workings of our ecological noise barriers
At the heart of every sound-absorbing noise barrier from RAU® is a metal mesh construction whose mesh mats and support profiles are solid and galvanized. This makes them extremely corrosion-resistant and durable. We line this metal grid construction with our RAU® UV-protect geotextile. It consists of non-rotting fiber fleece with stitched-on coconut fiber and is UV-resistant. The geotextile has a service life of 60 years and is specially manufactured for RAU® noise barriers. We then backfill the construction with soil substrate. Sustainable action and cooperation with local partners are important to us here: we obtain the necessary soil and bulk materials from local suppliers of mineral raw materials. This guarantees short transportation routes. In some cases, we can use excavated material from local road construction so that valuable soil can be reused.

It's so green: the right planting

Thanks to our many years of experience in gardening and landscaping, we can provide our customers with the best possible advice when it comes to choosing the right plants for our noise barriers. Our aim is to use the plants specifically as a design element. We always use species that are native to the respective region. The selection depends on the location of the noise barrier in terms of light conditions and soil quality, but of course also on the personal taste of our customers.

Tested, certified and approved

Of course, RAU® noise barriers meet all static requirements. Our noise barriers hold a European patent, are CE-certified and comply with DIN EN 1793-2 and DIN EN 20354.

Highest sound insulation

For the classification of a noise barrier in group B3 with the highest sound insulation in accordance with DIN EN 1793-2, the ZTV-Lsw 06 (Additional Technical Contract Conditions and Guidelines for the Execution of Noise Barriers on Roads) require a single value of at least DLR>24dB for the sound insulation.

Noise barriers from RAU® reliably meet this requirement with a calculated single value for airborne sound insulation of DLR=68 dB.

This calculation is based on the RAU® climate wall is based on a minimum area-related mass of the wall of approx. 560 kg/m2. This results from a volume density of 1,400 kg/m3 when the soil substrate is dry and a minimum thickness of the RAU® noise barriers of 40 cm. For the RAU® Climate Wall S has a different structure to the RAU® Klimawandbut also meets the required values for classification in group B3 with the highest sound insulation.

Highest sound absorption

In terms of sound absorption, RAU® noise barrier systems with a determined single value for sound absorption of DLa= 20 dB meet the requirements of group A 4 with the classification “highly absorbent” according to DIN EN 20354. This is the group with the highest sound absorption.

Facts: Sound insulation

Table of the calculated frequency-dependent sound reduction index Ri for a noise barrier of the RAU® noise barrier system with a surface weight of 560 kg/m2
f [Hz]Ri
10049,7
12551,6
16053,8
20055,7
25057,6
31559,6
40061,7
50063,7
63065,7
80067,7
100069,7
125071,6
160073,8
200074,7
250075,6
315076,3
400077,1
500077,8

Facts: Sound absorption

Table of sound absorption coefficients αSi determined according to DIN EN 20354 for a noise barrier of the RAU® noise barrier system according to test report 97097 /1/

f [Hz]αSi
1001,19
1250,87
1600,94
2000,98
2500,87
3151,06
4001,08
5000,92
6300,94
8001,02
10001,12
12501,10
16000,98
20001,05
25000,89
31500,94
40001,02
50001,07