Efectos acústicos inmediatos de una secuencia de ejercicios vocales con tubos de resonancia

AUTOR(ES)
FONTE

Revista CEFAC

DATA DE PUBLICAÇÃO

16/11/2011

RESUMO

PURPOSE: the purpose of this study is to determine the immediately acoustic effect of phonatory exercise sequence using resonance tubes in a group of dysphonic subjects METHOD: a unique sequence of four phonatory tasks within resonance tubes was applied in twenty-four teachers with dysphonic voices, assessed perceptually with GRBAS scale. Voice samples were recorded before and after the exercise sequence. Acoustic analysis included the following items: Cepstrum, Jitter, Shimmer, noise-harmonic ratio (NHR). Subjects were asked to fill out a vocal self-assessment protocol after the exercise sequence in order to assess the subjective effects of these exercises. Acoustic parameters of voice samples pre and post training were compared. RESULTS: significant changes were obtained in the Cepstral analysis, jitter and harmonic-to-noise ratio. In the self-assessment, positive effects prevailed over the negative ones, being the main, as follows: more steady voice, more clear voice and more open throat sensation. CONCLUSION: the outcome indicates that the use of phonatory tasks with resonance tubes may have immediate therapeutic physiological effects on subjects with hoarse voices and a subjective perception of improvement in voice production after the therapy.

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