Tyre noise limits of EC/661/2009 and ECE R117: Evaluation based on sold tyres in the Netherlands
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Memorandum to the Netherlands Ministry of Infrastructure and the Environment in response to its request for research into

  • the effect of the present tyre Regulations on the exterior noise levels of tyres
  • comparison of the tyre noise levels in the present distribution with the limit values defined in the tyre Regulations
  • definition of the levels of “present-day technology and ambitious technology on base of the distribution of levels found in the present tyre population”.

Reference Number: GRB-60-08
Origin: Netherlands and M+P
Date: 2 September 2014
Related Documents:
GRB-60-08/Add.1 | Shifts in tyre sound levels between 2007 and 2013 (Addendum)
GRB-61-18 | ETRTO comments on GRB-60-08, GRB-60-12, GRB-60-14-Rev.1 and GRB-61-03
GRB-62-11 | Proposal for amendments to the 02 series of amendments to Regulation 117
GRB-62-17 | Comments on tyre noise performance and proposal for higher stringecy
Discussion(s):
Working Party on Noise | Session 60 | 1-3 Sep 2014

14. The expert from the Netherlands presented the outcome of a study (GRB-60-08 and Add.1) of the shifts in tyre sound emission levels in his country between 2007 and 2013, i.e. before and after the revision of tyre noise limits in 2009 (EC/661/2009 and UN Regulation No. 117). The study addressed the most common C1, C2 and C3 tyres in terms of size and manufacturer. The reductions in tyre sound levels between 2007 and 2013 were found to be respectively 1.5, 1.4 and 1.1 dB(A) for C1, C2 and C3 tyres.