Aircraft are particularly loud during take-off and landing. The noise is generated not only by the engines, but also by airflow over the wings. One reason for this is the shape of the wings and the position of the high-lift devices, which vary according to the flight situation. To find out exactly where the greatest sources of noise are, the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) has tested a model from aircraft manufacturer Embraer for the very first time under realistic flight conditions in the European Transonic Wind Tunnel (ETW).
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