Acoustically designed noise barriers in perforated metal

The reduction of sound and noise to provide a quieter environment and a design oriented appearance is primary objective of noise protection systems made of perforated metal.

High noise levels and sources, such as roads, bridges, tunnels, cooling towers, power stations, motorways and airports make effective sound/noise absorption necessary.


The insulation is protected, stabilised and, thanks to the enormous variety of perforation patterns and materials, such as aluminium, galvanised steel or stainless steel, a high quality protective façade.


Perforated metal, in the form of external corrosion resistant construction components, such as noise protection barriers and cassettes, is ideal for carrying sound absorbing insulation materials.

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Applications in detail

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Kraftwerk-Schallschutz aus Lochblech

Material: Perforated aluminium sheet
Perforation pattern: Round, staggered – R4 T6
Project: Evonic – Cooling Tower Power Plant, Duisburg Walsum
Cooperation: KAEFER Industrie GmbH


  • 11-metre high, 500-metre long, circular sound protection barriers made of perforated metal
  • Here, the perforated metal sheets provide protection and a strong framework for sound absorbing mineral wool
  • The acoustic design was implemented perfectly using perforated aluminium sheets
  • 36,500 m² of perforated metal sheet used in sound protection