2. 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 Measurement Uncertainties (IWG MU) and will consider a proposal that was prepared by IWG MU with the aim to reduce variability.

GRBP-76-08 | Sound Measurement Uncertainties informal group status report to GRBP
GRBP-76-09 | UN R51: Proposal to amend document GRBP/2022/16 Proposal from the informal group on sound Measurement Uncertainties to amend their previous formal proposal.
GRBP/2022/16 | UN R51: Proposal for Supplement 8 to the 03 series of amendments Proposal from the Measurement Uncertainties informal group to introduce measures to reduce variability across assessments.

GRBP will recall the IWG MU general approach how to handle measurement uncertainties in UN Regulations and will be informed about WP.29 considerations at its June 2022 session on this matter.

GRBP-76-11 | Proposal to amend the Reference Document on Sound Measurement Uncertainties Proposal for the Measurement Uncertainties informal group to amend their previous formal submission (GRBP/2022/9/Rev.1).
GRBP/2022/9/Rev.1 | A general approach how to handle sound measurement uncertainty Proposal for a reference document.

GRBP will address a proposal prepared by the experts from the International Organization for Standardization (ISO) that brings the latest ISO 10844 standard test surface into the UN Regulation.

GRBP/2022/13 | UN R51: Proposal for Supplement 8 to the 03 series of amendments Proposal to bring the latest ISO 10844 standard test surface into the Regulation.
GRBP/2022/13 | UN R51: Proposal for Supplement 8 to the 03 series of amendments Proposal to bring the latest ISO 10844 standard test surface into the Regulation.
GRBP/2022/16 | UN R51: Proposal for Supplement 8 to the 03 series of amendments Proposal from the Measurement Uncertainties informal group to introduce measures to reduce variability across assessments.
GRBP/2022/9/Rev.1 | A general approach how to handle sound measurement uncertainty Proposal for a reference document.
GRBP-76-08 | Sound Measurement Uncertainties informal group status report to GRBP
GRBP-76-09 | UN R51: Proposal to amend document GRBP/2022/16 Proposal from the informal group on sound Measurement Uncertainties to amend their previous formal proposal.
GRBP-76-10 | Questions on documents GRBP/2022/4 and GRBP-75-37 (Monitoring phase of RD-ASEP from 1 July 2023)
GRBP-76-11 | Proposal to amend the Reference Document on Sound Measurement Uncertainties Proposal for the Measurement Uncertainties informal group to amend their previous formal submission (GRBP/2022/9/Rev.1).
GRBP-76-14 | UN R51: Comparison of EMISIA and ATEEL study on sound limit values
GRBP-76-15/Rev.1 | UN R51: TF Vehicles' Sound Status Report Previous name of this TF was TF-SL for Sound Limits
GRBP-76-29 | UN R51: Research on Measurement Methods for LDV & HDV in Multiple Driving Mode Conditions CATC Data Study and Measurement Methods Research
GRBP-76-08
Sound Measurement Uncertainties informal group status report to GRBP
15 Aug 2022 Working Party Informal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions GRBP-76-0008
GRBP-76-09
UN R51: Proposal to amend document GRBP/2022/16
31 Aug 2022 Working Party Informal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Proposal from the informal group on sound Measurement Uncertainties to amend their previous formal proposal. GRBP-76-0009
GRBP-76-10
Questions on documents GRBP/2022/4 and GRBP-75-37 (Monitoring phase of RD-ASEP from 1 July 2023) (OICA)
15 Aug 2022 Working Party Informal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions GRBP-76-0010
GRBP-76-11
Proposal to amend the Reference Document on Sound Measurement Uncertainties
31 Aug 2022 Working Party Informal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Proposal for the Measurement Uncertainties informal group to amend their previous formal submission (GRBP/2022/9/Rev.1). GRBP-76-0011
GRBP-76-14
UN R51: Comparison of EMISIA and ATEEL study on sound limit values (ACEA and OICA)
02 Sep 2022 Working Party Informal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions GRBP-76-0014
GRBP-76-15/Rev.1
UN R51: TF Vehicles' Sound Status Report
29 Aug 2022 Working Party Informal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Previous name of this TF was TF-SL for Sound Limits GRBP-76-0015/Rev.1
GRBP-76-29
UN R51: Research on Measurement Methods for LDV & HDV in Multiple Driving Mode Conditions (CATARC and China)
02 Sep 2022 Working Party Informal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions CATC Data Study and Measurement Methods Research GRBP-76-0029
GRBP/2022/9/Rev.1
A general approach how to handle sound measurement uncertainty
24 Jun 2022 Working Party Formal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal for a reference document. GRBP/2022/0009/Rev.1
GRBP/2022/13
UN R51: Proposal for Supplement 8 to the 03 series of amendments (ISO)
15 Jun 2022 Working Party Formal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Proposal to bring the latest ISO 10844 standard test surface into the Regulation. GRBP/2022/0013
GRBP/2022/16
UN R51: Proposal for Supplement 8 to the 03 series of amendments
15 Jun 2022 Working Party Formal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Proposal from the Measurement Uncertainties informal group to introduce measures to reduce variability across assessments. GRBP/2022/0016