ISSN: 0090-3973
Published Online: 11 October 2007
Page Count: 7

Field Evaluation of Tire-Road Noise Using a New Close Proximity Method

Seung Cho, Dae
Department of Naval Architecture & Ocean Engineering, Pusan National University,

Seo, Youngguk
Korea Expressway Corporation Test Road Center, Expressway & Transportation Technology Institute, Korea Expressway Corporation,Dongtan, Hwasung,

Muk Choi, Tae
Senior Researcher,Createch Co.,

(Received 3 April 2007; accepted 15 September 2007)

Abstract

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.

Keywords:
NCPX, surface microphone, tire-road noise, coasting and steady

Paper ID: JTE101172
DOI: 10.1520/JTE101172
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