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02-HandoutsResonanceandVPD - Cook Children's

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Pharyngeal<br />

Cul de Sac Resonance<br />

• Enlarged tonsils block sound transmission to<br />

oral cavity<br />

Mixed Resonance<br />

• Hypernasality and/or nasal emission on oral<br />

sounds and hyponasality on nasal sounds<br />

• Due to:<br />

– VPI and obstruction<br />

– Apraxia<br />

13

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