Finger Kazoo Intensive Short-term Vocal Therapy: Vocal and Aerodynamic Measurements in Female Teachers

  • Mara Keli Christmann
    Speech Therapy Departament, Voice Laboratory Voz, Federal University of Santa Maria, RS, Brazil

    Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil

    Associação Educacional Luterana Bom Jesus (IELUSC), Joinville, SC, Brazil
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  • Daniela da Silva Gonçalves
    Address correspondence and reprint requests to Daniela da Silva Gonçalves, Universidade Federal de Santa Maria, Departamento de Fonoaudiologia, Building 26E, Av. Roraima, 1000, Ca, Santa Maria, Rio Grande do Sul, Brazill 97105-900.
    Speech Therapy Departament, Voice Laboratory Voz, Federal University of Santa Maria, RS, Brazil
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  • Carla Aparecida Cielo
    Speech Therapy Departament, Voice Laboratory Voz, Federal University of Santa Maria, RS, Brazil
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Published:December 12, 2022DOI:



      to verify the effect after short-term intensive therapy with the Finger Kazoo technique on vocal and aerodynamic measures of dysphonic female teachers.


      blind randomized clinical trial. Fifteen female teachers without structural disorders of vocal folds and nine with vocal nodules participated in the study groups. Yet, nine female teachers without structural disorders and eight with vocal nodules in the control groups. The following variables were measured pre and post-therapy: minimum and maximum fundamental frequency: forced vital capacity; simple phonic coefficient; compound phonic coefficient; ratio between maximum phonation time of /a/ and expected maximum phonation time.


      no statistical significance was observed in the intra and intergroup analyses in any of the measures.


      in this group of female teachers, it was not possible to show a positive effect of short-term and intensive therapy with the Finger Kazoo technique on the vocal measures of minimum and maximum fundamental frequency, forced vital capacity, simple phonic coefficient, compound phonic coefficient, and the relationship between maximum phonation time of /a/ and expected maximum phonation time.

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