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.
Source(s)	Add source(s) of document, if applicable
Status	Superseded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	WP.29/2022/4		UN R51: Proposal for Supplement 7 to 03 series of amendments (Withdrawn)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)
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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.