Understanding Loudness Variations for Aircraft Landing Procedures at Arlanda (ULLA)

Anders Johansson
KTH/MWL, Center for Sustainable Aviation Stockholm, Sweden

Karl Bolin
KTH/MWL, Center for Sustainable Aviation Stockholm, Sweden

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp19162010

Ingår i: FT2019. Proceedings of the 10th Aerospace Technology Congress, October 8-9, 2019, Stockholm, Sweden

Linköping Electronic Conference Proceedings 162:10, s. 93-98

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Publicerad: 2019-10-23

ISBN: 978-91-7519-006-8

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


As of today air traffic is increasing at Arlanda airport, resulting in higher noise levels. This project has been launched to investigate the possibilities of optimizing flight procedures for a quieter approach. A network of acoustic measurement stations has been developed to measure single aircraft pass-by noise at ground level. The pass-by noise levels have been evaluated together with flight trajectory’s and the current meteorological conditions in order to investigate how operational procedures impact the noise distributions on ground. This paper presents the result of from a snap-shot of measurements that show variations in generated noise levels for similar approach routes and weather conditions. Difference as large as 10 dB was found between, pass-by’s performed by the same individual aircraft. The reduced velocity for the quieter flight, stands out as the major factor to reduce noise levels.


acoustical measurements, aircraft noise, noise reduction


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