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本工作用两种方法研究了声音的响度辨别阈(△I/I)与信号时程(t)的关系.用信号比较法测得的△I/I不受t的长短的影响,即△I/I=K.用拍感受法测得的结果却有所不同:当t短于极限时间T时,△I/I与t的平方根成反比,即△I/I=K’(T/t)~(1/2);当t长于T时,△I/I趋于恒定,即△I/I=K’;T约为150毫秒.用拍感受法测得的响度辨别阈与信号时程的关系,和以前测得的音调辨别阈与信号时程的关系十分相象.
This work uses two methods to study the relation between the loudness discrimination threshold (ΔI / I) and the signal time history (t) of the sound.The △ I / I measured by the signal comparison method is not affected by the length of t I / I = K. The results measured by the beat feel method are different: when t is shorter than the limit time T, ΔI / I is inversely proportional to the square root of t, that is, I / I = K ’ t) ~ (1/2); when t is longer than T, △ I / I tends to be constant, that is, △ I / I = K ’; T is about 150 milliseconds. The relationship between time history and previously measured pitch discrimination threshold and signal time history are very similar.