Active control of fan noise--feasibility study.

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Bibliographic Details
Corporate Author:	United States. National Aeronautics and Space Administration
Format:	Government Document Book
Language:	English
Published:	[Washington, DC] : [Springfield, Va.] : National Aeronautics and Space Administration ; [National Technical Information Service, distributor], [1994-]
Series:	NASA contractor report NASA CR-195392. NASA contractor report ; NASA CR-195440. NASA contractor report ; NASA CR-198511. NASA contractor report ; NASA CR-198512. NASA contractor report ; NASA CR-198513. NASA contractor report ; NASA CR-198514.
Subjects:	Acoustic ducts. Acoustic propagation. Aeroacoustics. Aerodynamic noise. Computerized simulation. Controllers. Ducted fans. Effective perceived noise levels. Engine inlets. Engine noise. Exhaust systems. Fan blades. Jet aircraft noise. Noise reduction. Pressure ratio. Sound generators. Turbofan engines.

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