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Considerations on the use of existing road traffic noise models for GRBP work (HMG) |
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2025-02-18 | HMG |
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Technical Background dLASEP Term (HMG) |
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2025-07-28 | This presentation provides information on the term ΔL<sub>ASEP</sub> introduced by OICA in its sound level proposal GRBP/2025/20. HMG |
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RD-ASEP: Proposal for data analysis work plan (HMG) |
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2025-10-08 | HMG |
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Data Analysis task force status report to RD-ASEP informal group (HMG) |
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2026-06-22 | The Task Force Data Analysis held 14 meetings, with 12 used to eliminate database errors and 2 to begin data analysis. The analysis revealed the need to better understand the concept and history of RD-ASEP development. Questions were raised regarding whether RD-ASEP should follow envelope functions framing typical sound behaviour of vehicle components or average behaviour with acceptable tolerance. Comparing databases from 2017/2020 and 2023/2024 showed different pass/fail rates across vehicle types. The group seeks clarification on RD-ASEP model optimization, accuracy expectations, and documentation explaining historical background and parameter selection. HMG |