Houtsma A J, Wicke R W, Ordubadi A
J Acoust Soc Am. 1980 Apr;67(4):1312-22. doi: 10.1121/1.384184.
Pitch phenomena related to the periodic interruption rate of white noise have traditionally been regarded as evidence for time domain pitch processing in the auditory system since spectra of these signals are flat. Short-term spectra, however, contain information about the interruption rate. Melodic interval identification experiments were performed with sounds comprising low-pass filtered noise modulated by either a sine wave, a square wave, or a periodic narrow pulse wave. Melodic intervals were generated by varying the modulation frequency fm while the low-pass cutoff frequency fco of the noise was an experimental variable. The correct identification score shows a particular dependence on the ratio fco/fm for each type of modulation signal. Shapes and relative positions of performance functions are compared with predictions derived from an energy detector (time domain) model and a short-term power spectrum correlation (frequency domain) model, and are found to support the former more strongly than the latter. There is some evidence, however, for the existence of both types of processing in the auditory system.
与白噪声的周期性中断率相关的音高现象，传统上被视为听觉系统中时域音高处理的证据，因为这些信号的频谱是平坦的。然而，短期频谱包含有关中断率的信息。使用由正弦波、方波或周期性窄脉冲波调制的低通滤波噪声组成的声音进行旋律音程识别实验。通过改变调制频率fm来产生旋律音程，而噪声的低通截止频率fco是一个实验变量。正确识别分数显示出对每种调制信号类型的fco/fm比率有特定的依赖性。将性能函数的形状和相对位置与从能量检测器（时域）模型和短期功率谱相关性（频域）模型得出的预测进行比较，发现前者比后者得到更强有力的支持。然而，有一些证据表明听觉系统中存在这两种类型的处理。
