The development of a new tire-road noise measurement device in France

An equipment was designed in France, where three microphones are mounted near the contact zone between the road surface and the tire of a test vehicle. With this equipment, it is possible to evaluate the tire-road noise generated at different speeds ranging from 50 kilometres per hour up to 130 kilometres per hour, but at a constant pace along a road section. The development of such a method for the evaluation of road surface properties, requires that the specific effects of the vehicle, the tire and external noise contributions are mitigated and removed if necessary. A great care was paid on the investigation of the aerodynamic noise contribution due to the displacement of the microphones along with the vehicle. Experiments were made indoors, in an airflow produced by a wind turbine, in order to qualify and evaluate the turbulent air flow around the microphones, and design appropriate windshields. Additional experiments performed outdoors on real measurement conditions confirmed that when using standard windshields, the tire-road noise level is more than 10 dB(A) higher than the airflow noise contribution, which makes this later negligible. Further investigations on the possible perturbing sources were also made.


  • English

Media Info

  • Pagination: 13p

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Filing Info

  • Accession Number: 01389599
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Aug 23 2012 3:35AM