Which statement about velopharyngeal closure and nasal airflow is correct?

• A. Nasal airflow can be eliminated by altering articulation without addressing closure
• B. Velopharyngeal closure affects only vowels
• C. Nasal airflow has no effect on speech intelligibility
• D. Inadequate velopharyngeal closure leads to excessive nasality

Answer: (D)

Velopharyngeal closure is the mechanism that seals the velopharyngeal port so air can be directed into the oral cavity during speech. This seal is essential for producing oral sounds with enough pressure and for preventing nasal air from escaping.

The statement that nothing short of a proper closure leads to excessive nasality is the best description because when the velopharyngeal port does not close adequately, air leaks through the nose during many oral sounds. That nasal air escape creates hypernasality and often nasal emission, which listener perception links directly to reduced clarity and intelligibility.

Changing articulation alone cannot reliably eliminate nasal airflow if the closure mechanism isn’t functioning; the seal must be present to completely stop nasal air from intruding during oral speech. Also, the idea that this closure affects only vowels isn’t accurate—nasality and nasal airflow influence both vowels and many consonants, especially those requiring oral pressure. Finally, nasal airflow does impact intelligibility; excessive nasality or nasal emissions can make speech harder to understand.