GAR | GRBP/2021/22

Document Number GRBP/2021/22

1	2	3	4	6
Document title	UN R51: Proposal for Supplement 7 to 03 series of amendments
Date	1 Jul 2021			Proposal from the Noise Measurement Uncertainties informal group to to reduce variability of measurements.

Status	Superseded
Rulemaking area(s)	UN R51 Vehicle Noise
Meeting(s)	GRBP \| Session 74 \| 15-17 Sep 2021 Agenda item 3. UN Regulation No. 51 (Noise of M and N categories of vehicles) UNR51-DG \| Session 10 \| 21 Sep 2021 TFMU \| Session 13 \| 13 Jul 2021
Related documents
	WP.29/2022/4		UN R51: Proposal for Supplement 7 to 03 series of amendments (Withdrawn)
	WP.29/2022/84		UN R51: Proposal for Supplement 7 to 03 series of amendments (Adopted by WP.29)
Downloads:		.pdf format	.docx format
Excerpts from session reports related to this document
GRBP \| Session 74 \| 15-17 Sep 2021			5. The expert from IWG MU presented a proposal which reduces measurement uncertainties for the ambient conditions, vehicle selections and preparations (ECE/TRANS/WP.29/GRBP/2021/22). GRBP adopted the proposal, subject to the following correction of paragraph 2.1.3.2.2. of Annex 3: “Tests carried out on request of the manufacturer at air temperatures below 5° C shall be accepted as well”. GRBP requested the secretariat to submit it for consideration and vote at the March 2022 sessions of WP.29 and AC.1 as draft Supplement 7 to 03 series of amendments to UN Regulation No. 51.