Surface type and age effects on tyre/road noise levels

Abstract

Road surface characteristics are the core influencing factors for tyre/road noise generation mechanisms. Depending on the pavement wearing layer mixture composition, type surfaces have different acoustical properties. Acoustical parameters and acoustical behavior change over the time because of the effects of traffic and environmental conditions. Usually low noise pavements can be characterized with very good acoustical parameters but at the same time good acoustical properties deterio-rates over the time. Paper presents the research study of surface type and age effects on tyre/road noise levels. Number of different age and different surface type pavements (conventional AC and SMA pavements, low noise SMA TM, TMOA and PA) were evaluated and compared in terms of acoustical performance. Analysis of CPX noise level measurement results are presented in the paper followed with the conclusions and recommendations of low noise pavement application for severe climate regions.