急激な立ち上がり・立ち下がりを有する正弦波信号に対する聴覚マスキングの時空間特性

概要

論文の詳細を見る
Temporal masking of brief test-tone pulses by a 2-kHz sinusoidal masker burst is investigated using simultaneous,forward and backward masking paradigms. The time interval ΔT between masker and test-tone pulse and test-tone frequency are varied. The most important result is an atlas of temporal masking effects produced by the masker onset or offset. Masking patterns grow and spread abruptly at transients, that is, the masked thresholds at short time interval ΔT at onset or offset are considerably higher than the thresholds in steady-state conditions over wide ranges in frequency. Temporal masking patterns at masker onset are investigated with a basilar membrane model which shows similar effects to the patterns. Comparison of temporal masking pattern with instantaneous power spectra of a sinusoidal masker burst shows that the masking pattern can not be directly estimated by physical characteristics of the input signal. From above results, a mechanism of the perception of clicks perceived at onset or offset of the masker is discussed.
社団法人日本音響学会の論文
1983-09-01