GAR | GRBP/2021/22

Document Title	UN R51: Proposal for Supplement 7 to 03 series of amendments
Reference Number	GRBP/2021/22
Date	1 Jul 2021
Summary	Proposal from the Noise Measurement Uncertainties informal group to to reduce variability of measurements.
Rulemaking Area(s)	UN R51 Vehicle Noise
Proposal Status	Superseded
Meeting(s)	GRBP \| Session 74 \| 15-17 Sep 2021 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	WP.29/2022/4	UN R51: Proposal for Supplement 7 to 03 series of amendments \| Withdrawn	supersede?
	WP.29/2022/84	UN R51: Proposal for Supplement 7 to 03 series of amendments \| Adopted by WP.29	supersede?
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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.