A Subjective Evaluation of Synthesized STOL Airplane NoisesNational Aeronautics and Space Administration, 1973 - Short take-off and landing aircraft - 34 pages |
Common terms and phrases
000 One-third-octave band 2-engine jet 2-engine turboprop A-weighted annoying point solution band center frequency Band sound pressure blown flaps Centerline landing Centerline take-off correlation coefficient critical band CTOL duration corrections EAP 1 EAP EAP1 EAP2 EPNdB equally annoying point error of estimate future STOL aircraft geometric mean histories of overall IPNL Langley Research Center LC(c Lc(m least-squares fitting linear least-squares analysis measurement location noise certification NOISE STIMULI One-third-octave band center Overall sound pressure perceived level perceived noise level PNdB psychometric function RA1 RA2 PNL(m RA1 RA2 RA1 RA2 RA1 RA2 rating scale units relative annoyance sec Overall sound shaped noise sideline noises sideline of take-off Sideline take-off simulated STOL slope sound pressure level sounds except standards standard error standard sound STOL aircraft noise STOL sounds subjective annoyance subjective data subjective scale values synthesized STOL noises TABLE VII take-off and landing tone corrections turbofan