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      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.

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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.
 

Challenge

Conventional drive-by measurements are dependent on personnel and weather conditions. Results must be available quickly, comply with standards, and be directly incorporated into development decisions – ideally without manual post-processing.

 

Solution
 

PAK pass-by enables real and simulated measurements in accordance with international standards. All relevant signals – speed, GPS, level, vehicle status – are recorded synchronously, visualized, and automatically checked. The combination of driver displays, automatic signal integrity, and real-time evaluation ensures reliable results with minimal effort.

 

Process
 

1. Preparation

  • Selection of standard, configuration of sensors & parameters

2. Path planning

  • Real or simulated pass-by with synchronous data acquisition

3. Analysis

  • Evaluate level curves, check limit values, generate reports

4. Derivation

  • Recommendations for optimization and documentation for authorities 

Results
 

  • Test times reduced
  • Noise emissions reduced
  • Less rework thanks to early NVH detection

Customer

 

✅ With PAK, OEMs can perform pass-by exterior noise measurements much more efficiently. Intuitive operation, automated processes, and immediate availability of results enable well-founded acoustic decisions – with reduced development time.

⭐️ 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.

 


📩 Contact us 

to learn how PAK pass-by can support your exterior noise measurement tasks.

PAK – more than just a measurement solution!

Measurement, analysis, and cloud platform for the smart transformation of NVH data processing.