Discrimination of natural acoustic variation in vocal signals.
Discrimination of natural acoustic variation in vocal signals.
复制标题
人声信号中自然声变的判别。
DOI：
10.1038/s41598-020-79641-z
复制
发表时间：
2021-01-13
影响因子：
4.6
通讯作者：
Dooling RJ
中科院分区：
文献类型：
--
作者：
Fishbein AR;Prior NH;Brown JA;Ball GF;Dooling RJ
声学交流的研究通常集中在发声的类别和单位上，但这些信号的发出方式也发生了微妙的变化。在人类语言中，承载信息的不仅是音素和单词，还有语音传递方式的音色、语调和重音(通常被称为“副语言内容”)。在非人类动物中，声音信号的发声差异也携带着跨类群的行为相关信息。然而，这些线索的辨别能力很少在心理物理范式中得到测试。在这里，我们集中在斑马雀(斑马雀)的声音交流，这是一种鸣禽物种，雄性在歌唱中重复产生一个单一的刻板印象的主题。这些主题演唱，就像许多鸟儿的歌声重复，听起来非常类似于普通的人类听众。在这项研究中，我们表明斑马雀可以很容易地区分不同的发音，即使是在单音节的水平上，就像人类可以辨别语音的发音一样。这些结果支持这样一种观点，即对细微的声学细节的敏感性可能是斑雀鸣叫中信息的主要渠道，也是跨物种发声通信系统的共同基础特性。
Studies of acoustic communication often focus on the categories and units of vocalizations, but subtle variation also occurs in how these signals are uttered. In human speech, it is not only phonemes and words that carry information but also the timbre, intonation, and stress of how speech sounds are delivered (often referred to as “paralinguistic content”). In non-human animals, variation across utterances of vocal signals also carries behaviorally relevant information across taxa. However, the discriminability of these cues has been rarely tested in a psychophysical paradigm. Here, we focus on acoustic communication in the zebra finch (Taeniopygia guttata), a songbird species in which the male produces a single stereotyped motif repeatedly in song bouts. These motif renditions, like the song repetitions of many birds, sound very similar to the casual human listener. In this study, we show that zebra finches can easily discriminate between the renditions, even at the level of single song syllables, much as humans can discriminate renditions of speech sounds. These results support the notion that sensitivity to fine acoustic details may be a primary channel of information in zebra finch song, as well as a shared, foundational property of vocal communication systems across species.
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