%0 Journal Article %T Acoustic pre-design studies of ducted fans for small aircraft %A Koppelberg, Jan %A Weintraub, Daniel %A Jeschke, Peter %J CEAS Aeronautical Journal %V 13 %N 4 %P 877-889 %@ 1869-5582 %D 2022-10-01 %I Springer Vienna %~ DeepDyve