02040nam 2200481I 450 991070427780332120160202154117.0(CKB)5470000002438894(OCoLC)936383922(EXLCZ)99547000000243889420160202j201509 ua 0engurcn|||||||||txtrdacontentcrdamediacrrdacarrierApplication of an aligned and unaligned signal processing technique to investigate tones and broadband noise in fan and contra-rotating open rotor acoustic spectra /Jeffrey Hilton Miles and Lennart S. HultgrenCleveland, Ohio :National Aeronautics and Space Administration, Glenn Research Center,September 2015.1 online resource (13 pages) color illustrationsNASA/TM ;2015-218865Title from title screen (viewed on Feb. 2, 2016)."September 2015.""Prepared for the 22nd International Symposium on Air Breathing Engines (ISABE 2015) sponsored by the International Society for Air Breathing Engines, Phoenix, Arizona, October 25-30, 2015."Includes bibliographical references (pages 6-7).Acoustic propertiesnasatRotating shaftsnasatContrarotating propellersnasatNoise spectranasatAeroacousticsnasatAcoustic properties.Rotating shafts.Contrarotating propellers.Noise spectra.Aeroacoustics.Miles J. H.1386529Hultgren Lennart S(Lennart Sven),NASA Glenn Research Center,GPOGPOBOOK9910704277803321Application of an aligned and unaligned signal processing technique to investigate tones and broadband noise in fan and contra-rotating open rotor acoustic spectra3435513UNINA