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UN R117: Rolling sound emission - C1 temperature correction proposal

Document GRBP-77-12

31 January 2023

77th GRBP session (7-10 Feb 2023)

Proposal from the Noise Measurement Uncertainties informal group for amendments to Annex 3.

Status: Informal GR review

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Previous Documents, Discussions, and Outcomes

77th GRBP session (7-10 Feb 2023)

5. (e) | UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

24. The expert from IWG MU proposed to update the rolling noise temperature correction for C1 tyres (GRBP-77-11 and GRBP-77-12). GRBP invited IWG MU to submit an official document for consideration at the next session.

Reference Number:	WP.29/2025/2
Meeting Session(s):	195th WP.29 session (3-7 Mar 2025)
Document date:	24 Dec 24
Document status:	Formal WP.29 review
Regarding:	Communications/Connectivity

Reference Number:	EVE-79-05
Meeting Session(s):	79th EVE session (17 Dec)
Document date:	23 Dec 24
Regarding:	GTR No. 21 EV Power Determination \| GTR No. 22 EV Battery Durability \| HD EV Battery Durability

Reference Number:	VIAQ-30-09
Meeting Session(s):	30th VIAQ session (11 Oct)
Document date:	23 Dec 24
Regarding:	MR 3: VIAQ

Reference Number:	WT-64-03
Meeting Session(s):	64th WT session (16 Dec)
Document date:	22 Dec 24
Regarding:	UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

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