Evidence for a cancellation mechanism in perceptual segregation by differences in fundamental frequency
Evidence for a cancellation mechanism in perceptual segregation by differences in fundamental frequency
复制标题
通过基频差异消除知觉隔离机制的证据
DOI：
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复制
发表时间：
2005
期刊：
影响因子：
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通讯作者：
Tracy L. Caller
中科院分区：
文献类型：
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作者：
J. Culling;G. Linsmith;Tracy L. Caller
当目标语音材料的基频（F0）不同于干扰语音材料时，目标语音材料的识别更好。两个实验测试了这种效果是由消除过程介导的想法，该消除过程在感知上消除了一个F0上的声音。实验1使用112.5 Hz F0的单调化目标语音对抗两个单调化语音。两个频率的F0都是112.5 Hz，都是126 Hz，或100和126 Hz。当两个受试者共享126 Hz F0时，语音接收阈值（SRT）比其他两种情况下低约3.5 dB，仅相差0.3 dB。这些结果与能够仅在单个F0处去除声音的消除机制一致。实验2个复制和扩展Expt. 1，测试结果是否受到目标和分配器对特定F0的分配的影响。当所有句子共享一个共同的F0时，SRT现在比它们都不同时高1-1.5 dB。然而，所有4个SRT为共享SA的用户...
Identification of target speech material is better when it differs in fundamental frequency (F0) from interfering speech material. Two experiments tested the idea that this effect is mediated by a cancellation process that perceptually removes sound on one F0. Expt. 1 used monotonized target speech at 112.5 Hz F0 against two monotonized interferers. The F0s of the interferers were either both 112.5 Hz, both 126 Hz, or 100 and 126 Hz. Speech reception thresholds (SRTs) were about 3.5 dB lower when the two interferers shared a 126 Hz F0 than in the other two conditions, which differed by only 0.3 dB. These results are consistent with a cancellation mechanism that is able to remove sounds at only a single F0. Expt. 2 replicated and extended Expt. 1, testing whether the results were affected by the allocation of the target and interferers to particular F0s. When all sentences shared a common F0, SRTs were now 1–1.5 dB higher than when they were all different. However, all 4 SRTs for interferers sharing the sa...