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1. Phonation

   Linked via "Angle of Acoustic Occlusion"

   During normal, oral phonation, the velum achieves complete closure, sealing the velopharyngeal port against the posterior pharyngeal wall [4]. This closure ensures that the acoustic energy generated at the larynx is directed entirely through the mouth. If the velum fails to achieve this complete closure, resulting in velopharyngeal insufficiency, the [acoustic output](/entries/…