Resonance is the overall quality of the voice. A resonance disorder is when the quality of the voice changes as it travels through the different-shaped spaces of the throat, nose, and mouth. Resonance disorders include the following:
Hyponasality (Denasality): This is when not enough sound comes through the nose, making the child sound “stopped up.” This might be caused by a blockage in the nose or by allergies.
Hypernasality: This happens when the movable, soft part of the palate (the velum) does not completely close off the nose from the back of the throat during speech. Because of this, too much sound escapes through the nose. This can be due to a history of cleft palate, a submucous cleft, a short palate, a wide nasopharynx, the removal of too much tissue during an adenoidectomy, or poor movement of the soft palate.
Cul-de-Sac Resonance: This is when there is a blockage of sound in the nose, mouth, or throat. The voice sounds muffled or quiet as a result.
Reasons for Concern:
- Speech sounds hyponasal or hypernasal
- Air is heard coming out of the nose during speech