Working Party on Noise and Tyres | Session 74 | 15-17 Sep 2021
Web conference
Agenda Item 3.
UN Regulation No. 51 (Noise of M and N categories of vehicles)

GRBP will be informed about the activities of the Informal Working Group on Additional Sound Emission Provisions (IWG ASEP) and of the Informal Working Group on Measurement Uncertainties (IWG MU).

GRBP will address proposals prepared by IWG MU that introduce measures to reduce variability.

Under this agenda item, GRBP may expect a report on the activities of the newly established taskforce on sound level limits (TF SL).

Documentation
GRBP-74-03/Rev.1 UN R51: Guidelines of the TF VS (Vehicle sound)
GRBP-74-08 UN R51: Proposal for the Foreword to the ACEA tyre performance study (GRBP-74-09) (OICA)
GRBP-74-09 UN R51: ACEA tyre performance study report (OICA)
GRBP-74-11 IWG MU (Measurement Uncertainties): Reference document
GRBP-74-12 IWG MU (Measurement Uncertainties): Terms of Reference
GRBP-74-13 UN R51: Proposal to introduce a Temperature Correction for the Tyre Rolling Sound Component of Pass-by Tests
GRBP-74-20 (Measurement Uncertainty): IWG status report
GRBP-74-21 (ASEP): IWG status report
GRBP-74-22 UN R51: Proposal for 04 series of amendments
GRBP-74-27 UN R51: Study on future sound limits values for type-approval for vehicles of category M & N
GRBP-74-39 Vehicle Sound: TF Status Report
GRBP/2021/22 UN R51: Proposal for Supplement 7 to 03 series of amendments