Jump to content
Image of Årstabron
Quietly Improving Your Environment

Constrained Layer Damping on Old Steel Bridge

Vibratec reduces noise on the Årsta bridge in central Stockholm. Using a techninque called constrained Layer Dampening (CLD). Noise lowered with 6 dB.

After a recent renovation of the 1929 Årsta bridge in Stockholm an increase of noise was observed. Vibratec Akustikprodukter AB has been awarded a multi-step project to mitigate the noise by use of constrained layer damping (CLD).

Step one is to investigate the noise radiation from the bridge structure, and the partial contributions from deck, girders, wheel/rail contact etc. This involve vibro-acoustic modelling by Statistical Energy Analysis (SEA), lab testing of various CLD configurations at different temperatures, as well as similar CLD tests on a mock-up plus noise and vibration measurements on the actual bridge.

Our film about how we dampened noise from commuter trains using Constrained Layer Dampening.

Interested in Constrained Layer Damping?

Feel free to contact us for more information

Contact us

Vibratec Industry
  • Industrial

Reliable Industrial Solutions

Vibratec offers a wide range of sound, vibration, and shock isolation products, designed to meet the demanding needs of the industrial sector.

Multi-storey Timber Building
  • Construction

Avoid Structure-Borne Noise in Lightweight Constructions!

Multi-storey timber buildings have become a significant part of modern construction due to their environmental benefits and efficient, cost-effective building processes. However, lightweight constructions often pose challenges in sound insulation.

Vibratec SVIB Vibration Day 2024
  • Exhibitions

Vibratec at SVIB Vibration Day 2024!

We are excited to announce that Vibratec will be attending SVIB Vibration Day as an exhibitor! This is a prime opportunity for those working in vibration and acoustic solutions to connect and explore the latest in the field.

Norsk Akustisk Selskap
  • Exhibitions

Vibratec deltar på Norsk Akustisk Selskaps Høstmøte 2024

Vibratec ser frem til å delta som utstiller på høstmøtet i Bergen 1.–2. november.

Picture of a wall suspended on wall mounts with vibration isolation dampers to reduce impact and structure borne sound to adjacent apartments or rooms.
  • Construction

Vibratec’s Acoustic Wall Suspension

Looking for a solution to prevent vibrations from travelling between rooms? Our Wall Suspensions are designed to decouple inner walls, effectively reducing the transmission of vibrations and structure-borne sound.

  • Marine

Proven Solutions for the Marine Industry

Vibratec offers a comprehensive range of shock and vibration isolation products tailored to meet the specific demands of the marine industry. Our solutions cover all critical areas on board, from engines and generator sets to compressors, piping, and sensitive equipment.