Neise, W.W.NeiseFrommhold, W.W.FrommholdMechel, F.P.F.P.MechelHolste, F.F.Holste2022-03-032022-03-031994https://publica.fraunhofer.de/handle/publica/18527010.1006/jsvi.1994.1272en624690534Sound power determinations in rectangular flow ductsjournal article