TY - GEN A1 - Geyer, Thomas A1 - Sarradj, Ennes A1 - Fritzsche, Christoph T1 - Porous Airfoils: Noise Reduction and Boundary Layer Effects T2 - 15th AIAA/CEAS Aeroacoustics Conference, (30th AIAA Aeroacoustics Conference), Miami (FL/USA), 2009, AIAA, AIAA paper 2009-3329 Y1 - 2009 SN - 978-1-61567-141-0 PB - American Institute of Aeronautics and Astronautics CY - Reston, Va. ER - TY - GEN A1 - Sarradj, Ennes A1 - Fritzsche, Christoph A1 - Geyer, Thomas T1 - Silent Owl Flight: Bird Flyover Noise Measurements T2 - 16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference), 7-9 June 2010, Stockholm, Sweden paper 2010-3991 Y1 - 2010 SN - 978-1-60086-744-6 PB - American Institute of Aeronautics and Astronautics CY - Reston, Va ER -