Trill

1. The trill appears to "jump start" the vibratory behavior of the vocal folds. It is claimed that the trill balances resonance, fosters normal laryngeal tension by equalizing the aerodynamic and the myoelastic forces, and enhances coordination of respiration/phonation/articulation (Behlau and Pontes, 1990).
2. The clinician is to instruct the patient in production of a sound at a comfortable pitch and sustain it.
3. Then instruct the client to use pitch variation by sustaining the trilled sound into and ascending glides. Basically, the tongue acts as a springed trap door that creates pressure difference between the ouside air and the cavity behind the tip constriction.
4. The patient is to start voicing without the trilled sound and move into the trilled sound.