How Does Cleft Palate Affect Speech?
Cleft palate directly affects the ability to produce clear speech. Here is an explanation of the relationship.
The palate is essential for normal speech. Its primary role is to separate the mouth from the nasal cavity during speech sounds. When the palate is cleft or repaired, speech can be affected in several ways.
Speech problems associated with cleft palate:
- Hypernasality:
- Too much air escapes through the nose during speech
- Speech sounds "nasal" or "muffled"
- Affects consonant sounds that require oral pressure (P, B, T, D, K, G, S, Z, SH)
- Nasal air emission:
- Audible air leakage through the nose during speech
- The listener can hear air rushing out of the nose
- Weakens consonant sounds
- Compensatory articulation:
- The child learns to make sounds in abnormal ways to compensate
- Glottal stops (sounds made in the throat)
- Pharyngeal fricatives (sounds made with the back of the tongue)
- These habits may persist after palate repair
- What speech therapy addresses:
- Strengthening the palate muscles
- Directing airflow correctly
- Correcting compensatory articulation
- Practicing specific sounds
- When speech improves:
- After palate repair (9β12 months): the foundation is set
- After speech therapy (age 3+): active correction begins
- After VPI surgery (if needed): further improvement
Clinical Guidance
Cleft palate affects speech by allowing air to escape through the nose, causing hypernasality and weak consonants. Speech therapy and, if needed, secondary surgery can help children achieve clear, normal speech.