WHIS®top is a lightweight aluminium diffractor that can be mounted onto any existing noise barrier to deflect sound upwards. It adds a 4-5 dB noise reduction, comparable to raising the existing barrier 2m.

Advantages

Increasing reduction in existing situations
Improves reduction from existing noise barriers without radical measures.

Lower constructions
Any new noise barrier can be lowered by 2m with WHIS®top, meaning lower noise barriers and lighter construction.

Cost-effective
Building lower is more cost-effective, with fewer materials, lighter construction and reduced wind load.

Widely supported by residents
Because of its high reduction and preservation of views, the WHIS®top receives a lot of support from residents.

Specifications

  • No standard dimensions, custom work

  • Height: 0.2m

  • Reduction: 4-5dB

  • Weight ca. 40 – 100kg/m

  • Combine with concrete barrier for crash protection

Installation and maintenance

  • Mounted onto existing noise barrier

  • Linking barrier and WHIS®top is custom work

  • No changes to existing noise barrier required

Applications

  • Railroads

  • Link roads

  • Provincial roads

  • Distributor roads

  • Highways