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The vocal tract is the cavity in human beings and in animals where sound that is produced at the sound source (larynx in mammals; syrinx in birds) is filtered. In birds it consists of the trachea, the syrinx, the oral cavity, the upper part of the esophagus, and the beak. In mammals it consists of the laryngeal cavity, the pharynx, the oral cavity, and the nasal cavity. The estimated average length of the vocal tract in adult male humans is 16.9 cm and 14.1 cm in adult females.〔Goldstein, U.G. (1980) An articulatory model for the vocal tracts of growing children. Ph.D. dissertation, Massachusetts Institute of Technology, Cambridge, MA.〕 == See also == *Language *Talking birds - species of birds capable of imitating human sounds, but without known comprehension *Speech synthesis *Manner of articulation 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「vocal tract」の詳細全文を読む スポンサード リンク
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