02-HandoutsResonanceandVPD - Cook Children's
02-HandoutsResonanceandVPD - Cook Children's
02-HandoutsResonanceandVPD - Cook Children's
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VP Valve during Speech<br />
• Velopharyngeal valve is closed for oral sounds<br />
– Most consonants (air pressure sounds)<br />
– All vowels (resonance sounds)<br />
• Velopharyngeal valve is open for nasal sounds (m,<br />
n, ng)<br />
Purpose of VP Valve<br />
• Directs transmission of sound<br />
energy and air flow in the oral and<br />
nasal cavities during speech<br />
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