短音の周波数弁別における処理時間に関する考察 : 知覚過程と関連して

概要

論文の詳細を見る
The improvement in the frequency discrimination of a brief tone with the increase in the presentation time is investigated. The frequency difference limens(DL) are measured as a function of the tone duration(D) and the silent interval(Δt) between the two tones. Furthermore, the processing time for the frequency discrimination and the temporal growth course of the perception accuracy of a brief tone are discussed. The results obtained are as follows:(1) In the case where Δt is 0 msec, the DL values monotonically fall with increasing D but approach a finite asymptote for the long D of 150 msec. (2) In the case where D is 10-100 msec, the DL values monotonically fall with increasing Δt but the Δt values requiring to approach a finite asymptote monotonically fall with increasing D. (3) The perceptual processing time needs at least 220 msec for the frequency discrimination of a brief tone. (4) The improvement in the perception accuracy of a brief tone can be well fitted with the equation s(t_p)=α{1-exp(-t_p/τ)}, where s(t_p) is the perception accuracy of a brief tone, t_p is the presentation time including both D and Δt, α is a finite asymptote, and τ is a time constant. The estimated values of α increase with D and that of τ are about 20-30 msec.
社団法人日本音響学会の論文
1981-09-01