Progress of NASA research relating to noise alleviation of large subsonic jet aircraftConference on NASA research in noise reduction of subsonic jet aircraft - nacelle acoustic linings, sound generation in jet engines, and operational noise effects on humans
IDRelationTitle19690002212WorkInteragency aircraft noise abatement program19690002213WorkConference scope and noise concepts19690002214WorkNonlinear acoustic theory for thin porous sheets19690002215WorkDuct-lining materials and concepts19690002216WorkPerformance of inlet sound suppressors19690002217WorkStructural and environmental studies of acoustical duct-lining materials19690002218WorkIntroductory remarks on nacelle acoustic treatment application19690002219WorkDesign concepts19690002220WorkGround-runup tests of acoustically treated inlets and fan ducts19690002221WorkFlight-test nacelles19690002222WorkNoise predictions and economic effects of nacelle modifications to McDonnell Douglas DC-8 airplanes19690002223WorkSonic-throat inlets19690002224WorkTreated inlets19690002225WorkFan-duct development19690002226WorkNoise predictions and economic effects of Boeing nacelle modifications19690002227WorkQuiet engine program preliminary engine design and aircraft integration19690002228WorkQuiet engine program detailed engine designs19690002229WorkCompressor noise analysis19690002230WorkPotential of inlet-guide-vane configuration for inlet noise reduction19690002231WorkA study of exhaust noise as it relates to the turbofan engine19690002232WorkOptical crossed-beam investigation of local sound generation in jets19690002233WorkVariability in airplane noise measurements19690002234WorkTwo methods of evaluating climbout noise19690002235WorkFlight investigation of methods for implementing noise-abatement landing approaches19690002236WorkTechnique for calculating optimum noise-abatement take-off profiles19690002237WorkProcedures for estimating the effects of design and operational characteristics of jet aircraft on ground noise19690002238WorkPredicted and measured XB-70 ground-to-ground engine noise19690002239WorkPropagation of sound from aircraft ground operations19690002240WorkMethods of determining the excess attenuation for ground-to-ground noise propagation19690002241WorkEffects of atmospheric refraction on far-field sound propagation19690002242WorkSynthesis of aircraft noise19690002243WorkPrediction of effects of noise on man19690002244WorkStudies relating the individual characteristics of people with their responses to noise19690002245WorkAssessment of the validity of pure tone corrections to perceived noise level19690002246WorkJudgment tests of aircraft noise19690002247WorkPerceived sound and the frequency response characteristics of the human auditory system19690002248WorkHouse vibrations significant for indoor subjective response19690002249WorkCommunity reactions to aircraft noise - Noise measurements19690002250WorkCommunity reactions to aircraft noise - Public reactions