Perceived Noisiness Under Anechoic, Semi-reverberant and Earphone Listening Conditions |
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aircraft noises analysis anechoic chamber annoyance appear appropriate associated BASED ON PHYSICAL changes compared comparison condition CORRESPONDENCE BETWEEN RESULTS dBD2 duration earphone presentation effective Equivalent Standard Scores ESTIMATES 40 20 experiment FIGURE four frequency FUNCTION FOR STANDARD GEOMETRIC MEAN given Instructions intensity level judge listeners MAGNITUDE ESTIMATES 40 Max Eff Max maximum MEAN OF MAGNITUDE nine NOISE IN ANECHOIC NOISE IN REVERBERANT noises employed noisiness original test tape perceived noisiness PHYSICAL MEASURES TAKEN playback PNdB PNdBM POWER-LAW FUNCTION PREDICTION OF PSYCHOPHYSICAL PSYCHOPHYSICAL DATA OBTAINED r.m.s. error random range ratings recordings relative reliability Report reproduction response results obtained REVERBERANT RETEST REVERBERANT ROOM ROOT-MEAN-SQUARE-ERROR OF PREDICTION sets shown sound speaker spectra Standard Noise subjects t2 PNdBM Table TAKEN FROM ORIGINAL test and retest test item test scores test stimuli TEST-RETEST DATA three acoustic environments values various varying