Abstract
Objetivo correlacionar modificações vocais acústicas espectrográficas e autoavaliação após o finger kazoo. Métodos análise de /a:/ de 46 mulheres sem queixas vocais ou afecções laríngeas pelo Real Time Spectrogram® e autoavaliação antes (Momento 1 – M1), após o finger kazoo (Momento 2 – M2) e após cinco minutos de silêncio (Momento 3 – M3). Teste Kappa, Qui-quadrado, Spearman. Resultados melhora da intensidade do escurecimento do traçado dos formantes (F) e das altas frequências, regularidade do traçado e definição dos harmônicos. Melhora na autoavaliação vocal, conforme aumento da intensidade do escurecimento do traçado de F3, da definição do traçado, do número de harmônicos e redução da substituição de harmônicos por ruídos nas médias frequências. Conclusões após o finger kazoo, aumentou a intensidade da cor do traçado, a regularidade e definição nas espectrografias e houve melhora na autoavaliação vocal.
Highlights
The nonlinear theory of voice production suggests that the vocal tract, in addition to exercising filter function of the sound produced in the glottal source, acts as a modifier of the patterns of vocal fold vibration by modifying the acoustic impedance
2, 3, 4, 5, 6, and 7 are indicated changes observed through the analysis of SBW and SNB comparing the three stages involved in making the finger kazoo (FK)
We found a significant increase in the intensity of the stroke color of all F and high frequencies as well as significant improvement in the definition of F3 and F4, after five minutes of absolute silence after the completion of FK (M1XM3) (Tables [2, 3] and 4)
Summary
The nonlinear theory of voice production suggests that the vocal tract, in addition to exercising filter function of the sound produced in the glottal source, acts as a modifier of the patterns of vocal fold vibration by modifying the acoustic impedance. The semi-occluded vocal tract exercises (SOVTE), category in which is included the finger kazoo (FK) technique, have been widely used as features in speech therapy and voice Improvement[2,3,9,10]. (1) Speech therapy Department, of the Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil. (2) Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil. In these cases, the Speech therapist is the professional that possesses the capacity to act in the vocal rehabilitation and improvement. It is a must to have the anatomic and physiologic knowledge of the phonation system, besides its acoustic, aerodynamics and correlation among emotive estates and neurological conditions with the voice, as well as having mastered the techniques which comprise all the phonation process[11,12,13]
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