NASA Progress in Aircraft Noise PredictionNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1981 - Acoustical engineering - 38 pages |
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