Psychology, School of Life and Health Sciences, Aston University, Birmingham B4 7ET, United Kingdom.
J Acoust Soc Am. 2012 Sep;132(3):1548-60. doi: 10.1121/1.4740487.
Mistuning a harmonic produces an exaggerated change in its pitch, a component-pitch shift. The origin of these pitch shifts was explored by manipulations intended to alter the grouping status of a mistuned target component in a periodic complex tone. In experiment 1, which used diotic presentation, reinstating the corresponding harmonic (in-tune counterpart) caused the pitch shifts on the mistuned target largely to disappear for components 3 and 4, although they remained for component 2. A computational model of component-pitch shifts, based on harmonic cancellation, was unable to explain the near-complete loss of pitch shifts when the counterpart was present; only small changes occurred. In experiment 2, the complex tone and mistuned component 4 were presented in the left ear and the in-tune counterpart was presented in the right. The in-tune counterpart again reduced component-pitch shifts, but they were restored when a captor complex into which the counterpart fitted as harmonic 3 was added in the right ear; presumably by providing an alternative grouping possibility for the counterpart. It is proposed that component-pitch shifts occur only if the mistuned component is selected to contribute to the complex-tone percept; these shifts are eliminated if it is displaced by a better candidate.
失谐会使音高产生夸张的变化，即音分音高移动。通过旨在改变周期性复音中失谐目标成分分组状态的操作，研究了这些音高移动的起源。在使用双声道呈现的实验 1 中，重新引入相应的谐波（调谐对应物）导致失谐目标成分的音高移动在很大程度上消失，尽管对于成分 2 仍然存在。基于谐波抵消的音分音高移动计算模型无法解释在存在对应物时音高移动几乎完全消失的现象；只有很小的变化发生。在实验 2 中，复音和失谐成分 4 被呈现到左耳，调谐对应物被呈现到右耳。调谐对应物再次减少了音分音高移动，但当在右耳添加与对应物相匹配的作为第 3 个谐波的捕获复音时，音分音高移动又恢复了；可能是为对应物提供了另一种分组可能性。据提出，只有当失谐成分被选择为贡献复音感知时，才会发生音分音高移动；如果它被更好的候选者取代，这些移动就会消除。
