| Measurement uncertainties when testing in UN Regulations under the purview of GRBP |
| Reference Number: GRBP/2024/8 |
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Proposal from the Measurement Uncertainties informal group for a Document for Reference providing a general approach on how to handle measurement uncertainties in UN Regulations (initially addressing UN Regulations Nos. 51 and 117). |
| Meeting Sessions: 79th GRBP session (6-9 Feb 2024) |
| Document date: 24 Nov 23 |
| Document status: Formal GR review |
| 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 |
| Click here to view the full document file |
| Noise measurement uncertainties status report to GRBP |
| Reference Number: GRBP-79-02 |
| Meeting Sessions: 79th GRBP session (6-9 Feb 2024) |
| Document date: 10 Jan 24 |
| 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 |
| Click here to view the full document file |
| IWG ASEP: Status report |
| Reference Number: GRBP-79-11 |
| Meeting Sessions: 79th GRBP session (6-9 Feb 2024) |
| Document date: 25 Jan 24 |
| Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions |
| Click here to view the full document file |
| UN R51: Proposal for a supplement 10 to the 03 series of amendments |
| Reference Number: GRBP-79-33/Rev.1 |
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Some corrections and clarifications concerning power definition, calibration, temperature correction and Reference sound assessment |
| Submitted by: OICA |
| Meeting Sessions: 79th GRBP session (6-9 Feb 2024) |
| Document date: 07 Feb 24 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions |
| Click here to view the full document file |
| List of relevant GRBP Regulations for software updates |
| Reference Number: GRBP-79-42 |
| Submitted by: France |
| Meeting Sessions: 79th GRBP session (6-9 Feb 2024) |
| Document date: 05 Feb 24 |
| Relevant to: UN Regulation No. 9 | Three-Wheeled Cycle Noise, UN Regulation No. 41 | Motorcycle Noise, UN Regulation No. 51 | Vehicle Noise Emissions, UN Regulation No. 63 | Two-wheeled Moped Noise, UN Regulation No. 64 | Temporary-use Tires, UN Regulation No. 142 | Tyre Installation, UN Regulation No. 138 | Quiet Road Transport Vehicles, UN Regulation No. 141 | Tyre Pressure Monitoring Systems, UN Regulation No. 165 | Audible Reversing Warning Systems, and UN Regulation No. 156 | Software Update Processes and Management Systems |
| Click here to view the full document file |
| UN R51: Proposal for a supplement 11 to the 03 series of amendments |
| Reference Number: GRBP-79-43 |
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In introducing ASEP in Annex 7 in 2016, the scope was limited to vehicles with internal combustion engines (ICE) based on the experience of variabilities in the exhaust silencing systems. Electric driven vehicles have been exempted from ASEP. For electric driven vehicles the new UN Regulation No. 138, dealing with the reduced audibility of these vehicles, was worked out until 2017. At that moment no one expected sound enhancement systems beyond the scope and aim of UN R138. This proposal is an approach to address the concern that electric vehicles might be equipped with sound enhancement systems beyond the scope and aim of UN R138. This proposal does not require any changes to UN R138.01. This proposal is given as a supplement to enable the quickest entry into force, providing all manufacturers clear direction on the design of sound enhancement systems. |
| Submitted by: OICA |
| Meeting Sessions: 79th GRBP session (6-9 Feb 2024) |
| Document date: 06 Feb 24 |
| Document status: Informal GR review |
| Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions |
| Click here to view the full document file |
| ASEP / RD-ASEP Study |
| Reference Number: GRBP-79-45 |
| Submitted by: OICA |
| Meeting Sessions: 79th GRBP session (6-9 Feb 2024) |
| Document date: 06 Feb 24 |
| Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions |
| Click here to view the full document file |
| Noise Measurement Uncertainties: Proposal to amend GRBP/2024/8 |
| Reference Number: GRBP-79-48/Rev.1 |
| Meeting Sessions: 79th GRBP session (6-9 Feb 2024) |
| Document date: 08 Feb 24 |
| Document status: Formal GR review |
| 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 |
| Click here to view the full document file |
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Informal Working Group: A group of experts authorized to develop proposals for consideration by WP.29 without being bound by formal UN rules of procedure.