Modificações vocais e laríngeas imediatas em mulheres após a técnica de fonação em tubo de vidro imerso em água

Abstract

verify and correlate the acoustic vocal modifications of filter and glottal source, perceptual hearing, laryngeal, sound pressure level (SPL) and self-reported vocal sensations, after the phonation in a glass tube immersed in water (PGTIW), on adult women. Methods: observational study cross-sectional quantitative analytical, composed of 24 adult women, with ages between 18 and 40 years (average 23,04 years), without laryngeal affections (LA) and without vocal complaints, being 12 in the study group (SG) and 12 in the control group (CG). In the EG was held the collection of the vowel /a:/, measure of SPL, videolaryngostroboscopy (VLS), execution of the technique of PGTIW in three sets of the 15 repetitions and, immediately after, the collect of vowel /a:/, measure of SPL, VLS and reporting of sensations in relation to voice. In the CG, the same procedures were performed, but instead the implementation of technical, the volunteers remained in silence. Was performed vocal acoustic analysis with the programs Multi Dimension Voice Program Advanced and Real Time Spectrogram (Kay Pentax®). Judges speech therapyst performed the analysis of spectrographies, with specific protocol and hearing perceptual with the RASAT scale and judges otolaryngologists performed the analysis of the VLS. It was used the statistical tests Wilcoxon, Chi-square and Spearman. Results: On the SG: improvement of the smoothed pitch perturbation quotient (sPPQ), voice turbulence index (VTI), Shimmer percentage (Shim) and Shimmer in dB (ShdB); improvement of breathiness in RASATI; increase of the tracing darkening of the fourth formant, the definition of the first formant, the definition and the number of harmonics; increase the SPL and sensation better voice; in the VLS, the laryngeal vestibule constriction did not change significantly. Positive correlation between sensation better voice and the definition of the second and third formants and regularity the tracing; between measures of Shimmer and breathiness; between the fundamental frequency and maximum instability. Conclusion: in the group of women without laryngeal disorders and without vocal complaints studied, the technique generated a reduction of of vibration glottal aperiodicity and the noise, with consequent improvement of the glottal signal. In VLS, the laryngeal vestibule constriction did not change significantly, this suggests that the technique does not cause laryngeal hypertension.