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Milestones in Noise Abatement
The Sonic Boom Phenomenon
14 other sections not shown
Acoustic Energy aerodynamic Aeronautics Air Force aircraft noise Aircraft Noise Abatement airplane airports analysis analytical areas blade blown flap bypass ratio compressor conducted configurations continue contract decibels determine develop duct effects engine noise environment evaluate experimental fan noise Federal Aviation Administration Federal Aviation Regulations flow flyover frequency Helicopter in-house effort infrasound inlet investigation jet exhaust jet noise Kryter Laboratory Langley Research Center lift fan Mach number ment methods nacelle NASA noise and sonic noise certification noise exposure noise measurements noise reduction Noise Research noise sources nozzle operations parameters Perceived Noise Level performance phase PNdB prediction procedures propagation propeller propulsion system Quiet Engine ratio Research Center response rotor shock wave simulated sonic boom research sound pressure level speed STOL subsonic Supersonic Jet supersonic transport suppressor takeoff techniques Technology theoretical tion Transportation turbine turbofan turbofan engine turbulence USAF V/STOL velocity VTOL