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Design and preliminary evaluation of the vocal cords and articulator of an infant-like vocal robot 'Lingua'

机译:婴儿式声带机器人“ Lingua”的声带和发音器的设计和初步评估

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Several observational studies have suggested that the vocal development of an infant towards language acquisition is by interaction with caregivers. However, owing to the difficulty of controlling infant vocalization, the underlying mechanisms of the process and how they are affected by the behavior of the caregiver are yet to be clearly established. Towards clarifying these outstanding issues, we developed an infant-like vocal robot, "Lingua," as a controllable vocal platform that affords a model of real infant vocalization. Lingua has two features, namely, infant-like voice and high articulation capability. The shapes of its vocal cords and vocal tract are similar to those of a 6-month-old infant as determined from anatomical data. Seven degrees of freedom of tongue articulation were realized by a sophisticated design comprising linkage mechanisms inside a miniaturized vocal tract, and this enabled the achievement of high articulation performance. The relationship between the material hardness of the vocal fold and its acoustic performance was examined, and the results of preliminary experiments showed that the robot could vocalize almost the same ranges of fundamental frequencies and vowel-like utterances as an infant.
机译:几项观察性研究表明,婴儿的语言发展是通过与照顾者的互动来实现的。然而,由于难以控制婴儿的发声,该过程的潜在机制以及如何受到照顾者行为的影响尚待明确。为了澄清这些悬而未决的问题,我们开发了一种婴儿式声乐机器人“ Lingua”,作为可控的语音平台,提供了真实的婴儿声控模型。 Lingua具有两个特征,即婴儿般的声音和较高的发音能力。根据解剖学数据确定,其声带和声道的形状类似于一个6个月大婴儿的形状。复杂的设计包含了微型声道内的连杆机构,实现了七种舌头发音自由度,从而实现了很高的发音性能。研究了声带材料硬度与其声学性能之间的关系,初步实验结果表明,该机器人可以发出与婴儿几乎相同范围的基本频率和类似元音的发声。

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