Resonance disorders in children

For family education. This resource is not an individual diagnosis or treatment plan. Discuss concerns with an appropriately qualified professional.

What it means

Resonance disorders involve abnormal balance or transmission of sound through the mouth and nose during speech. Speech may sound too nasal, insufficiently nasal, or muffled. This differs from the sound-producing voice system, although voice and resonance concerns can coexist.

Causes and risk factors

Possible causes include differences in the palate or throat, cleft or submucous cleft palate, obstruction, neurological movement difficulties, or learned speech patterns. The mechanism matters because structural, neurological, and learned causes require different management.

Signs and everyday impact

Families may notice excessive nasal sound, nasal air escaping during speech, weak pressure consonants, reduced nasal sound when congested, or a muffled quality. Feeding-related nasal regurgitation may also prompt assessment. A brief change during a cold does not by itself establish a persistent resonance disorder.

Assessment and diagnosis

A speech-language pathologist and appropriate medical specialists assess speech, oral structures, palate movement, hearing, and airway factors. A cleft or craniofacial team may be involved. Instrumental assessment can help investigate the closure between mouth and nose when indicated. The team distinguishes structural problems from learned sound errors.

Treatment and therapy

Speech therapy can address learned articulation patterns and some functional speech needs. Structural insufficiency may need surgery or a prosthetic device; exercises alone cannot correct an anatomical gap. Treatment of obstruction or another medical cause is individualized. Follow-up assesses both speech and relevant airway or hearing concerns.

Support at home

Use supportive communication and follow team advice. Avoid unprescribed blowing, sucking, or mouth exercises intended to 'close' a palate gap. Ask for demonstrations of any appropriate speech practice. Continue accepting the child's messages while the treatment plan is developed.

When to seek help

Breathing difficulty or significant feeding problems requires medical care. Persistent resonance changes, nasal regurgitation, or suspected palate differences should be evaluated rather than treated with generic exercises.

Questions for the care team

• Is the cause structural, neurological, obstructive, or learned?
• Is a cleft or craniofacial team assessment needed?
• Which speech targets are appropriate before or after medical treatment?

Terms in plain language

• Hypernasality: excessive nasal resonance.
• Hyponasality: reduced nasal resonance.
• Velopharyngeal: relating to the closure between the mouth and nose.

Podcast preparation

Use this resource to prepare a later episode: define the topic, discuss causes and signs, explain assessment, describe treatment and home supports, then close with urgent signs and a next step.

Not every nasal-sounding voice can be corrected by speech practice alone.

Verify current clinical guidance and obtain clinical review before public recording.

Sources

1. Resonance Disorders - https://www.asha.org/practice-portal/clinical-topics/resonance-disorders/
2. Voice Disorders - https://www.asha.org/practice-portal/clinical-topics/voice-disorders/
3. Speech Sound Disorders: Articulation and Phonology - https://www.asha.org/practice-portal/clinical-topics/articulation-and-phonology/

Sources accessed 3 October 2026.