An extensive study has been undertaken during the period September 1989 - July 1991 on how and to what extent traffic noise can be reduced by 'measures at the source'. The experimental part of the study was conducted on a runway of the air-base 'Welschap' near Eindhoven. The results are presented in the report. The measures at the source described here consist of a modified design of the road surface on the one hand and a selection of tires for optimum match with the road surface on the other hand. The application of thin porous asphalt surface results in a noise reduction of 3.5 to 5 db(A) for light vehicles dependent on vehicle speed. The selection of quiet tires yields an additional 2 dB(A) reduction. The road surface consists of two layers: a 5 cm thick base layer of coarse grain and a 2 cm thick fine grain top layer. One of the conclusions in the report is that a wide scale application of the findings require that the acoustical quality of road surfaces as well as of tires be systematically controlled. As far as the road surfaces are concerned, existing test methods can to a certain extent be used, but for tires new representative methods for measuring and evaluating the acoustical properties have still to be developed.
Weg met Geluid (Reduction of Traffic Noise)
1993
74 pages
Report
Keine Angabe
Englisch
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