3. GRB noted ECE/TRANS/WP.29/GRB/2012/5, tabled by the expert from the Russian Federation, to provide harmonized definitions on vehicle type concerning noise, the terms noise and sound. The expert from IMMA expressed a reservation (GRB-56-08) on the proposal as a whole arguing that the introduction of new definitions would be premature, taking into account the recent publication of Revision 2 of UN Regulation No. 41. GRB agreed to resume consideration on this proposal at its February 2013 session on the basis of further information provided by the expert from the Russian Federation.
4. GRB considered GRB-56-04, introduced by the expert from ISO, updating the text concerning the test site of the UN Regulation with the latest amendment of ISO Standard 5130:2012. The proposal received comments from the expert by Germany who suggested more objective criteria in verifying the level of porosity of the test site. GRB agreed to resume consideration on this subject on the basis of a revised proposal voluntarily prepared by the expert from ISO.
5. The expert from IMMA sought GRB’s clarification on paragraph 8.2. on the conformity of production tests, specifically: whether the 1 dBA allowance was applicable to the maximum A-weighted sound pressure level representing urban driving (Lurban) and to the sound pressure level in wide open throttle (Lwot). GRB agreed that currently paragraph 6.2.3. (specification regarding sound levels) clearly stated that the difference between Lwot shall not exceed the limit value for Lurban by more than 5 dB and if the +1dB was applied to Lurban, as given in Annex 6, then this additional +1 dB allowance was automatically also applicable to Lwot value.