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Zebra finches exhibit speaker-independent phonetic perception of human speech

机译:斑马雀科动物表现出与说话者无关的语音

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摘要

Humans readily distinguish spoken words that closely resemble each other in acoustic structure, irrespective of audible differences between individual voices or sex of the speakers. There is an ongoing debate about whether the ability to form phonetic categories that underlie such distinctions indicates the presence of uniquely evolved, speech-linked perceptual abilities, or is based on more general ones shared with other species. We demonstrate that zebra finches (Taeniopygia guttata) can discriminate and categorize monosyllabic words that differ in their vowel and transfer this categorization to the same words spoken by novel speakers independent of the sex of the voices. Our analysis indicates that the birds, like humans, use intrinsic and extrinsic speaker normalization to make the categorization. This finding shows that there is no need to invoke special mechanisms, evolved together with language, to explain this feature of speech perception.
机译:不论个人声音或说话者性别之间的可听差异,人类都能轻松分辨彼此在声学结构上非常相似的口语单词。关于形成这种区别基础的语音类别的能力是表明存在独特发展的,与语音相关的感知能力,还是基于与其他物种共有的更普遍的能力,目前正在进行辩论。我们证明了斑马雀(Taeniopygia guttata)可以区分和分类其元音不同的单音节单词,并将此分类转换为新颖的说话者所讲的相同单词,而与声音的性别无关。我们的分析表明,鸟类与人类一样,使用内在的和外在的说话人归一化方法进行分类。这一发现表明,无需调用与语言一起发展的特殊机制来解释语音感知的这一特征。

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