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LIST OF ILLUSTRATIONS
Noises Employed in Experiment Comparing
DATA ANALYSIS AND RESULTS
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Aircraft Noises Steady-State analysis anechoic chamber annoyance arbitrary zero average an increase BASED ON PHYSICAL chance factors dBD2 decibel doubling of rated duration earphone presentation Eff dBA 2.3 Eff Max Eff effective Equivalent Standard Scores experiment geometric mean intensity level level of 9.9 listener positions magnitude estimation technique Max Eff dBA Max Eff Max Max PNdBM nine test stimuli noise stimuli noises employed Noises Max Eff noises required OBTAINED WITH EARPHONES Order Group original test tape pad settings perceived noisiness PHYSICAL MEASURES TAKEN PNdB PNdBt2 power law PREDICTION OF PSYCHOPHYSICAL PSYCHOPHYSICAL DATA OBTAINED psychophysical results r.m.s. error range rated noisiness results obtained retest data retest scores reverberant room Root-mean-square ROOT-MEAN-SQUARE-ERROR OF PREDICTION semi-reverberant room six levels sound pressure levels spectra standard noise standard stimulus steady-state noises stimulus item Table V ROOT-MEAN-SQUARE-ERROR TAKEN FROM ORIGINAL TAPE Aircraft Noises tensity levels test and retest test results TEST TAPE Aircraft three acoustic environments