The integration of nonsimultaneous frequency components into a single virtual pitch
The integration of nonsimultaneous frequency components into a single virtual pitch
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DOI：
10.1121/1.426847
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发表时间：
1999-04-01
影响因子：
2.4
通讯作者：
Darwin, CJ
中科院分区：
文献类型：
--
作者：
Ciocca, V;Darwin, CJ
通过使用基音匹配任务来研究非同时频率分量在单个虚拟基音中的整合，在该任务中，失谐的四次谐波(失谐分量)产生调和序列(155-HzF0的12个等幅谐波)中的基音漂移。在实验1中，错误调谐的组件可以是同时的，在目标开始时停止(目标前组件)，或者在目标停止时开始(目标后组件)。靶前成分产生的基音位移显著小于同时成分产生的基音位移；在靶后条件下，基音位移的大小并不比同时条件下减小。在实验2中，在非同步成分和目标声音之间引入了20、40、80或160毫秒的静音间隔。在目标前条件下，对于XO毫秒或更长的静音间隙，音调漂移被减少到零；相比之下，需要160毫秒的间隙来消除目标后条件下的音调漂移。第三个实验检验了这一假设，即当出现目标后成分时，目标音调的音调加工在目标开始时开始，并在音调漂移降为零的空隙持续时间结束。当目标音调持续时间为410毫秒时，不能观察到音调变化，这一发现证实了这一假设。总而言之，这些实验的结果表明，与目标声音开始之前的分量相比，在目标声音开始之后出现的非同时分量对目标的虚拟音调的贡献更大，并且在更长的时间内。(C)1999年美国声学学会。[S0001-4966(99)02604-1]。
The integration of nonsimultaneous frequency components into a single virtual pitch was investigated by using a pitch matching task in which a mistuned 4th harmonic (mistuned component) produced pitch shifts in a harmonic series (12 equal-amplitude harmonics of a 155-Hz F0). In experiment 1, the mistuned component could either be simultaneous, stop as the target started (pre-target component), or start as the target stopped (post-target component). Pitch shifts produced by the pre-target components were significantly smaller than those obtained with simultaneous components; in the post-target condition, the size of pitch shifts did not decrease relative to the simultaneous condition. In experiment 2, a silent gap of 20, 40, 80, or 160 ms was introduced between the nonsimultaneous components and the target sound. In the pre-target condition, pitch shifts were reduced to zero for silent gaps of XO ms or longer; by contrast, a gap of 160 ms was required to eliminate pitch shifts in the post-target condition. The third experiment tested the hypothesis that, when post-target components were presented, the processing of the pitch of the target tone started at the onset of the target, and ended at the gap duration at which pitch shifts decreased to zero. This hypothesis was confirmed by the finding that pitch shifts could not be observed when the target tone had a duration of 410 ms. Taken together, the results of these experiments show that nonsimultaneous components that occur after the onset of the target sound make a larger contribution to the virtual pitch of the target, and over a longer period, than components that precede the onset of the target sound. (C) 1999 Acoustical Society of American. [S0001-4966(99)02604-1].