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| Document Title | UN R51: Proposal to introduce a Temperature Correction for the Tyre Rolling Sound Component of Pass-by Tests | ||||||||
| Reference Number | GRBP-74-13 | ||||||||
| Date |
3 Sep 2021
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| Summary | IWG on Measurement Uncertainties identified the temperature behaviour of tyre rolling sound component as a contributor to the measurement uncertainty of pass-by noise tests. Since in UN Reg. No.117 a temperature correction of tyre rolling sound is already established the group investigated an adoption of the existing calculation procedure. Due to the different testing conditions in UN Reg. No.117, new scientific investigations and industry data in pass-by testing the group worked out a temperature correction, which is adopted to the requirements of UN Reg. No.51. | ||||||||
| Rulemaking Area(s) | UN R51 Vehicle Noise | ||||||||
| Proposal Status | Informal GR review | ||||||||
| Meeting(s) | |||||||||
| Downloads | |||||||||
| UNECE server | .pdf format | .docx format | |||||||
| Excerpts from session reports related to this document | |||||||||
| GRBP | Session 74 | 15-17 Sep 2021 |
6. The expert from IWG MU briefly introduced a second package of draft amendments to UN Regulation No. 51 (GRBP-74-13). GRBP also noted an updated reference document with a general approach to estimate measurement uncertainties (GRBP-74-11) and was of the view that this document could be applicable to UN Regulations beyond the scope of GRBP. |
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