NASA Progress in Aircraft Noise PredictionNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1981 - Acoustical engineering - 38 pages |
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Page 15
... flight conditions . Acceptable results for the DC - 10 were obtained because of ... takeoff power noise levels were apparently overpredicted in the forward arc ... procedures is discussed in the next section . Optimized Takeoff Procedures ...
... flight conditions . Acceptable results for the DC - 10 were obtained because of ... takeoff power noise levels were apparently overpredicted in the forward arc ... procedures is discussed in the next section . Optimized Takeoff Procedures ...
Page 16
John P. Raney. Optimized Takeoff Procedures The Aircraft Noise Prediction Program has facilitated a set of systematic noise reducing trajectory studies which is unique in a number of ways . First , a standard optimization program is used ...
John P. Raney. Optimized Takeoff Procedures The Aircraft Noise Prediction Program has facilitated a set of systematic noise reducing trajectory studies which is unique in a number of ways . First , a standard optimization program is used ...
Page 17
... procedures to present commercial aircraft . A study of the L - 1011 takeoff procedures has since clarified this point . Optimized L - 1011 Takeoff The Lockheed L - 1011 Tristar is selected for an optimized takeoff study for a number of ...
... procedures to present commercial aircraft . A study of the L - 1011 takeoff procedures has since clarified this point . Optimized L - 1011 Takeoff The Lockheed L - 1011 Tristar is selected for an optimized takeoff study for a number of ...
Common terms and phrases
1/3-octave band acoustic power Aircraft Noise Prediction aircraft position ANOPP predictions atmospheric attenuation body validation studies Boeing combination tone Comparison of ANOPP contouring method CTOL directivity angle effective perceived noise EPNdB EPNL values equation fan noise figure 14 flight dynamics flyover noise frequency band ground effects ICAO study jet noise prediction Langley Research Center Lateral Attenuation Lockheed McDonnell-Douglas measured and predicted measured data NASA NASA TM noise constraints noise contours noise data noise prediction methods Noise Prediction Program noise sources observer locations optimization overall mean-squared pressure overpredicted perceived noise level PNLT polar coordinates power setting power spectrum factor power spectrum level prediction with measured propagation effects radiation angle relative spectrum level shock cell noise shown in figure SNECMA sound pressure level source noise prediction spectra supersonic transport systems studies takeoff power takeoff procedures trajectory underprediction weighting function wide body validation