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Date: 2023-11-30
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Date: 2023-12-16
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Date: 2023-05-23
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friction (n.)
A term used in PHONETICS to refer to the sound produced when air passes a CONSTRICTION made in the VOCAL TRACT. The occurrence of audible friction is part of the phonetic definition of CONSONANTS; the phonetic definition of VOWELS requires that they be FRICTIONLESS. Various types of friction can be identified, in terms of anatomical point of origin, e.g. BILABIAL friction, PHARYNGEAL friction; friction above the GLOTTIS may be referred to as SUPRAGLOTTAL friction.
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