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Proposal from the Informal Working Group on Measurement Uncertainties (IWG MU) to amend UN R51 with tables showing the measurement uncertainties when performing type-approval, COP, or field testing (e.g. market surveillance).

The measurement uncertainties developed in this Appendix are based the IWG MU work and its Document for Reference which describes a general approach to estimate measurement uncertainties (GRBP/2022/9/Rev.2). The impact of the quantities on the expanded uncertainty has been evaluated separately for run-to-run, day-to-day, vehicle-to-vehicle and site-to-site variations. Some of the different impacts are based on calculations from tolerances in Annex 3, while others are based on experiences.

Meeting Sessions: 77th GRBP session (7-10 Feb 2023)

Document date: 31 Jan 23

Document status: Informal GR review

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions

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Proposal for a Revision 2 to the general approach how to handle noise measurement uncertainty

Reference Number: GRBP-77-08

Meeting Sessions: 77th GRBP session (7-10 Feb 2023)

Document date: 31 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

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A general approach how to handle noise measurement uncertainty

Reference Number: GRBP-77-07

Meeting Sessions: 77th GRBP session (7-10 Feb 2023)

Document date: 31 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

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Report from the 22nd Noise Measurement Uncertainties informal group session

Reference Number: IWGMU-22-10

Meeting Sessions: 22nd IWGMU session (25 Jan 2023)

Document date: 30 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

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Noise measurement uncertainties: Proposal for Revision 2 to the Document for Reference

Reference Number: IWGMU-22-06/Rev.1

Meeting Sessions: 22nd IWGMU session (25 Jan 2023)

Document date: 30 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

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Noise measurement uncertainties: Document for Reference-Proposal for editorial improvements

Reference Number: IWGMU-22-07/Rev.1

Proposal for improvements to the draft Revision 2 to GRBP/2022/9.

Meeting Sessions: 22nd IWGMU session (25 Jan 2023)

Document date: 30 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

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UN R51: Draft proposal for Supplement 9 to the 03 series of amendments

Reference Number: IWGMU-22-08/Rev.1

Draft proposal to introduce a new Annex 10 (“Estimation of the calculation of the expanded measurement uncertainties for sound measurements of Annex 3 for vehicles of category M and N”) to provide tables showing the measurement uncertainties when performing type-approval, Conformity of Production, and/or field testing (e.g. market surveillance). This work is associated with the “Document for Reference” which describes a general approach to estimating measurement uncertainties (GRBP/2022/9/Rev.1 pending consideration of Revision 2).

Meeting Sessions: 22nd IWGMU session (25 Jan 2023)

Document date: 30 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions

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Draft Noise Measurement Uncertainties informal group status report to GRBP

Reference Number: IWGMU-22-09/Rev.1

Meeting Sessions: 22nd IWGMU session (25 Jan 2023)

Document date: 30 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

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UN R138: Proposal for Supplement 3 to the 01 series of amendments

Reference Number: TFQRTV-05-04

Proposal to address inconsistency between UN R51 noise limits and AVAS sound levels under UN R138.

Submitted by: Switzerland

Meeting Sessions: 5th TFQRTV session (6-7 Feb 2023)

Document date: 28 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 138 | Quiet Road Transport Vehicles

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Management of noise emissions according to UN-R51-03 at low speeds vs. AVAS compliant to UN-R138

Reference Number: TFQRTV-05-03

Submitted by: OICA

Meeting Sessions: 5th TFQRTV session (6-7 Feb 2023)

Document date: 28 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 138 | Quiet Road Transport Vehicles

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Agenda for the 22nd Noise Measurement Uncertainties informal group session

Reference Number: IWGMU-22-01

Meeting Sessions: 22nd IWGMU session (25 Jan 2023)

Document date: 19 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

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UN R51: Consolidated version of Supplement 8 to the 03 series of amendments

Reference Number: GRBP-77-05

Consolidated version integrating GRBP/2022/13, GRBP/2022/16 and GRBP-76-09 as adopted during the 76th GRBP session and including corrections and clarifications per GRBP/2023/12.

Meeting Sessions: 77th GRBP session (7-10 Feb 2023)

Document date: 12 Jan 23

Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions

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Documents 2023 65 documents

3 Feb 2023 UN R51: RD-ASEP Monitoring Data sheet V4 (OICA) GRBP-77-15/Rev.1

3 Feb 2023 UN R51: Proposal for corrections to Supplements 7 and 8 to the 03 series of amendments (OICA, Germany) GRBP-77-13/Rev.1

3 Feb 2023 Noise Measurement Uncertainties informal group status report to GRBP GRBP-77-10/Rev.1

1 Feb 2023 UN R51: Proposal for a Supplement 9 to the 03 series of amendments GRBP-77-09

1 Feb 2023 Proposal for a Revision 2 to the general approach how to handle noise measurement uncertainty GRBP-77-08

1 Feb 2023 A general approach how to handle noise measurement uncertainty GRBP-77-07

30 Jan 2023 Report from the 22nd Noise Measurement Uncertainties informal group session IWGMU-22-10

30 Jan 2023 Noise measurement uncertainties: Proposal for Revision 2 to the Document for Reference IWGMU-22-06/Rev.1

30 Jan 2023 Noise measurement uncertainties: Document for Reference-Proposal for editorial improvements IWGMU-22-07/Rev.1

30 Jan 2023 UN R51: Draft proposal for Supplement 9 to the 03 series of amendments IWGMU-22-08/Rev.1

30 Jan 2023 Draft Noise Measurement Uncertainties informal group status report to GRBP IWGMU-22-09/Rev.1

28 Jan 2023 UN R138: Proposal for Supplement 3 to the 01 series of amendments (Switzerland) TFQRTV-05-04

28 Jan 2023 Management of noise emissions according to UN-R51-03 at low speeds vs. AVAS compliant to UN-R138 (OICA) TFQRTV-05-03

19 Jan 2023 Agenda for the 22nd Noise Measurement Uncertainties informal group session IWGMU-22-01

12 Jan 2023 UN R51: Consolidated version of Supplement 8 to the 03 series of amendments GRBP-77-05

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