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Background：Thephysiologicalstammeringinchildrencaneasilydevelopintobalbutiesifnottreatedintime．Balbutiescanexertnegativeeffectonthedevelopmentofthepatientchild＇spsy－chologyandtheformationofhisorherpersonality．Since１９９８，wehavebeenusingtheairvocal
Background: Thephysiologicalstammeringinchildrencaneasilydevelopintobalbutiesifnottreatedintime. Balbutiescanexertnegativeeffectonthedevelopmentofthepatientchild’spsy-chologyandtheformationofhisorherpersonality. Since1998, wehavebeenusingtheairvocal