Abstract: This paper describes the noise mitigation measures studied by the UK's Transport Research Laboratory (TRL), and gives an overview of relevant research into reducing transmission. A major research programme aims to identify the important characteristics of tyre design and road surface roughness that lead to the generation of significant noise. A special TRL vehicle, TRITON, is used to collect data on a wide range of surfaces. Absorptive barriers can be designed to eliminate reflected noise but it is necessary to choose the absorptive material to eliminate the most important frequencies of noise at the site. Tilted or contoured barriers should be considered as an alternative, but sound can be refracted back to ground level under adverse meteorological conditions. Multiple edge barriers and other barrier shapes are a solution to enhancing the acoustic barriers without raising their overall height. Boundary element method has been found to be useful for investigating spread of noise and designing effective mitigation measures. Future research may include the study of meteorological factors and use of ground cover to control noise. For the covering abstract see ITRD E111063.
Publication Year: 2000
Publication Date: 2000-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot