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Effects of damage on the acoustic effectiveness of noise barriers

The installation of noise barriers is a proven measure to protect built-up areas from unwanted noise pollution. During the course of their life cycle, however, various causes can lead to different types of damage. On behalf of the Federal Highway Research Institute (BASt), the Gesellschaft für Akustikforschung Dresden mbH therefore investigated the conditions under which the acoustic effectiveness of the sound barrier will be impaired.

Within the framework of a fundamental literature study, previous findings on the effects of construction and ageing damage on the acoustic effectiveness of noise barriers were collected and evaluated. After a comprehensive analysis of actual damage, types of damage were classified. Based on an extended model for describing the damage, sound field simulations and propagation calculations were carried out. The results were verified with test noise barriers. In-situ measurements of sound insulation and sound absorption on real, damaged noise barriers confirmed the developed calculation model.

In addition, a catalogue has been drawn up which specifically describes the influence of specific damage on the reduction of sound insulation and sound absorption. On this basis, targeted and cost-efficient measures can be taken in future to ensure long-term noise protection.

Additional Information

Research compact 08/2019

Report

Acoustic effectivity of old noise barriers
Reports of the Federal Highway Research Institute, book V 316, 2019

  • Contact

    Federal Highway Research Institute
    Brüderstraße 53
    D-51427 Bergisch Gladbach
    Info-Service
    Telephone: 0049 2204 43-9101
    Fax: 0049 2204 43-2550
    info@bast.de

  • Reports

    BASt's reports are almost entirely in German. Each report includes an english abstract. You can find the complete report by following the link to ELBA on the report's page.