We had exactly one attempt to meet the external noise limits – PAK pass-by gave us the confidence to do it right the first time.
Shortly before the market launch of a new model, the pressure is mounting: external noise measurements must be carried out quickly, reliably, and in compliance with regulations – despite tight time frames and high complexity. A tool that automates the process and delivers accurate results is worth its weight in gold here.
Initial situation & relevance
Exterior noise measurements are essential for homologation, CoP tests, and NVH optimization. Legal requirements such as UNECE R51/R41 demand precise evidence – under real conditions or on the test bench. At the same time, the increasing variety of models requires efficient test procedures with high repeatability.

⭐️ Key Features
- Standard-compliant measurements according to UNECE R51/R41
- Real & simulated tests – weather-independent and reproducible
- Automated processes, real-time data, and integrated reporting functions
- Less personnel required, faster decisions, lower costs
✅ Conclusion
PAK pass-by is a powerful tool for the legally compliant, efficient, and practical optimization of vehicle acoustics – on test tracks and test benches.
to learn how PAK pass-by can support your exterior noise measurement tasks.