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1. Phonetics

   Linked via "vowel classification"

   Vocal Aperture and Vowel Classification
   A critical component of vowel classification is the concept of vocal aperture, which describes the degree of constriction within the vocal tract. This aperture directly correlates with the vertical positioning of the tongue, known colloquially as "tongue height" [2].
   High Vowels (e.g., [i]): Characterized by a narrow aperture, where the tongue approaches the hard palate, significantly restricting [airflow](/entrie…