A new close proximity (NCPX) method has been proposed and applied for the tire-road noise characterization of highway traffic. The implementation of NCPX is based on a set of surface microphones that is attached to a vehicle to directly measure the tire noise. To consider a combined effect of vehicle and road factors, a comprehensive field test has been performed with seven vehicle types at nine pavement sections of the test road. Testing parameters also include a vehicle speed ranging from 50 to 120 km/h, and two driving modes are applied at each speed: coasting and steady. It is found that asphalt pavements are quieter than all concrete pavements irrespective of testing conditions. Among concrete pavements, an 18-mm longitudinally-tined surface exhibits the quietest noise level, while a random transversely-tined surface is ineffective in minimizing the tire noise. Finally, the effect of a heavy axle load on the tire/noise generation is discussed.
Field evaluation of tire-road noise using a new close proximity method
Betriebstestbewertung des Reifen-Weg-Geräusches unter Anwendung einer neuen Methode in unmittelbarer Nähe
Journal of Testing and Evaluation ; 36 , 1 ; 73-79
2008
7 Seiten, 14 Bilder, 3 Tabellen, 10 Quellen
Article (Journal)
English
Tire/road measurements with the close-proximity method
Automotive engineering | 1997
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