Objectives: To investigate the effects of a voice education program to teachers on vocal function exercise and voice hygiene and compare a pre- and post-vocal exercise for the teacher's voice quality.
Methods: A random sample of 102 subjects was divided into two groups: experimental group (29 women and seven men) with vocal hygiene and training exercises and control group (52 women and 14 men) with vocal hygiene. Two sessions were held about voice hygiene for the control group and five sessions for the experimental group, one being with reference to the vocal hygiene habit and four vocal exercise sessions. Acoustic analysis of the vowel [i] was made pre- and post-vocal exercise and for the situations of initial and final evaluation of the educational program. Student t test (paired) and Proc MIXED (repeated measures) were used for analyses with level of significance (α = 0.05).
Results: The training exercises, posture and relaxation cervical, decreased the mean of fundamental frequency (f(0)) for men (P = 0.04), and for the phonation, intensity, and frequency exercises, there was a significant increase for f(0) in woman (P = 0.02) and glottal to noise excitation ratio (P = 0.04). There was no statistically significant difference intergroup evaluations after 3 months. The control group presented increased mean voice intensity in the final evaluation (P = 0.01).
Conclusions: Voice training exercises showed a positive and immediate impact on the teacher's quality of voice, but it was not sustained longitudinally, suggesting that actions for this purpose should be continued at schools.
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