Lee J, Green D M
Department of Psychology, University of Florida, Gainesville 32611.
J Acoust Soc Am. 1994 Aug;96(2 Pt 1):716-25. doi: 10.1121/1.410310.
The ability to detect a mistuned component in a harmonic complex was measured as a function of harmonic number under three different stimulus procedures: simultaneous monotic, successive monotic, and simultaneous dichotic. In the first experiment, the fundamental frequency was 200 Hz, and the stimulus duration was 410 ms. The threshold obtained in the simultaneous-monotic procedure was lower than those obtained in the other two procedures, especially for harmonics above the third. It is argued that an envelope cue associated with lower-frequency components in the power spectrum of the envelope was the primary cue for the detection of a mistuned component in a harmonic complex in the simultaneous-monotic procedure. Thresholds did not differ for successive-monotic and simultaneous-dichotic procedures, suggesting that the detection of the mistuning was mediated above the level of the cochlea. In the second and third experiments, the stimulus duration and the fundamental frequency of the complex was altered. The envelope cue seemed to be weakened by decreasing the stimulus duration and by increasing the fundamental frequency.
在三种不同的刺激程序下，作为谐波数量的函数，测量了检测谐波复合体中失谐成分的能力：同时单耳、相继单耳和同时双耳。在第一个实验中，基频为200Hz，刺激持续时间为410ms。在同时单耳程序中获得的阈值低于在其他两个程序中获得的阈值，特别是对于高于第三谐波的谐波。有人认为，与包络功率谱中低频成分相关的包络线索是在同时单耳程序中检测谐波复合体中失谐成分的主要线索。相继单耳和同时双耳程序的阈值没有差异，这表明失谐的检测是在耳蜗水平以上介导的。在第二个和第三个实验中，改变了复合体的刺激持续时间和基频。通过缩短刺激持续时间和提高基频，包络线索似乎被削弱了。
