Perceived Noisiness Under Anechoic, Semi-reverberant and Earphone Listening Conditions |
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Aircraft Noises Steady-State analysis anechoic chamber annoyance arbitrary zero FIGURE BASED ON PHYSICAL chance factors dBD2 decibel duration earphone presentation Eff dBA 2.3 Eff Max Eff Eff PNdB Equivalent Standard Scores ESTIMATES 40 20 experiment FUNCTION FOR STANDARD GEOMETRIC MEAN intensity level listener positions MAGNITUDE ESTIMATES 40 magnitude estimation technique Max Eff dBA Max Eff Max Max PNdB maximum MEAN OF MAGNITUDE NASA nine test stimuli noise stimuli noises employed Noises Max Eff OBTAINED WITH EARPHONES Order Group original test tape perceived noisiness PHYSICAL MEASURES TAKEN POWER-LAW FUNCTION PREDICTION OF PSYCHOPHYSICAL PSYCHOPHYSICAL DATA OBTAINED psychophysical results r.m.s. error recordings results obtained retest data reverberant room Root-mean-square ROOT-MEAN-SQUARE-ERROR OF PREDICTION semi-reverberant room six levels sound pressure levels spectra standard noise standard stimulus Stanford Research Institute steady-state noises t2 Eff t2 Table TAPE Aircraft Noises tensity levels test and retest test scores TEST TAPE Aircraft three acoustic environments tl PNdBM