Objective: To evaluate 27 congenital veloparyngeal insufficiency(CVPI) subjects and 6 normal articulation subjects with airflow pressure techniques.
Methods: A compare analysis was performed in two groups (CVPI subjects and normal articulation subjects) during speech production of /hemper/ and /papa/.
Results: There wasn't statistical significance between two groups in oral air pressure and velopharyngeal orifice areas, however, CVPI group differed significant in nasal airflow on the articulation of /hemper/ and /papa/.
Conclusions: When the degree of CVPI subject's VP opening was small, hypernasality appeared to be related to duration of the opening-closing movements.