Bregman A S, Liao C, Levitan R
Department of Psychology, McGill University, Montreal, Canada.
Can J Psychol. 1990 Sep;44(3):400-13. doi: 10.1037/h0084255.
The perceptual grouping of a four-tone cycle was studied as a function of differences in fundamental frequencies and the frequencies of spectral peaks. Each tone had a single formant and at least 13 harmonics. In Experiment 1 the formant was created by filtering a flat spectrum and in Experiment 2 by adding harmonics. Fundamental frequency was found to be capable of controlling grouping even when the spectra spanned exactly the same frequency range. Formant peak separation became more effective as the sharpness (amplitude of the peak relative to a spectral pedestal) increased. The effect of each type of acoustic difference depended on the task. Listeners could group the tones by either sort of difference but were also capable of resisting the disruptive effect of the other one. This was taken as evidence for the presence of a schema-based process of perceptual grouping and the relative weakness of primitive segregation.
研究了四音周期的知觉分组作为基频和频谱峰值频率差异的函数。每个音调都有一个单一的共振峰和至少13个谐波。在实验1中，共振峰是通过对平坦频谱进行滤波产生的，在实验2中是通过添加谐波产生的。发现即使频谱完全跨越相同的频率范围，基频也能够控制分组。随着锐度（峰值幅度相对于频谱基座）的增加，共振峰峰值分离变得更加有效。每种声学差异的影响取决于任务。听众可以根据任何一种差异对音调进行分组，但也能够抵抗另一种差异的干扰作用。这被视为存在基于图式的知觉分组过程以及原始分离相对较弱的证据。
