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Key speech articulators in the human vocal tract. In the source–filter model of speech production, the vocal cords (the source) vibrate to generate sound, which is then modulated by the positions of the speech articulators (the filter) over time to generate specific speech sounds (i.e., phonemes) [25]. These speech articulators and the vocal cords are shown above. Figure reused with permission from Ref. [26]
