Measurements of Noise Caused by Tyre Friction on Different Test Roads

This report isabout various tests concerning noise caused by tyre-friction on various surface textu-res: on old and new concrete roads as well as ona rough, uneven surface.In this connection the influence of the various sur-face textures on the development of the noisecaused by tyre-friction is explained.Through these tests it could beproved that the sur-face textures of a highway are of imminent im-portance as regards noise emission.In addition it must be stressed that the frequencyanalysis is of great importance for the evaluationof noise emission on highway surfaces.