Challenges in comparing measured and modelled annual average noise levels around airports
Rebekka C. van der Grift (TU Delft - Aerospace Engineering)
Alireza Amiri Simkooei (TU Delft - Aerospace Engineering)
Mirjam Snellen (TU Delft - Aerospace Engineering)
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Abstract
Aircraft noise has a significant impact on communities near airports. To regulate noise, annual average levels such as Lden are modelled across large areas. This study examines the consistency between Lden predicted by the European Civil Aviation Conference Doc 29 model and measurements from noise monitoring terminals around Amsterdam Airport Schiphol from 2017 to 2024. While strong correlations confirm Doc29′s suitability for system-level assessments, systematic biases persist, with nighttime levels Lnight generally overestimated and Lden underestimated. Three potential sources were identified: difference between modelled and flown tracks, background noise influencing measured levels, and undetected flights, particularly for quieter aircraft and in low noise regions. Accounting for these factors improves correlation and reduces deviation between measurements and predictions. These results demonstrate promising methods for enabling noise model validation near airports. Further improvements in detection methods and operational modelling will increase the robustness of noise assessments and better support evidence-based policy development around major airports.
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