Immediate effect of oral application of high frequency oscillation in dysphonic subjects

Abstract

Objective: to evaluate the immediate effects oral oscillation generated by the high frequency unit Flutter ® device VRP1 in dysphonic individuals and to compare with normal and no vocal complaints individuals. Methodology: We will study 60 subjects of both sexes, aged 18-45 years old. After signature of the informed consent the individuals will be answer to questions about self-assessment of voice, vocal symptoms / laryngeal musculoskeletal pain; vocal register with vowel / a /, counting 1-20 and spontaneous speech for perceptual and acoustics analyses and phonatory measures. Then be divided into two groups: Group 1 - 30 dysphonic individuals who oral application of high-frequency oscillation (OOAF) generated by the device Flutter ® VRP1 performed for 3 minutes; Group 2 - 30 normal and no vocal complaints individuals at the same conditions that Group 1. After application of the technique, the same assessment procedures and vocals record initial will be repeat and will be the application of a self-assessment questionnaire to investigate the effect of these characteristics as the sensations in their voice, larynx, articulation and breathing. The vocal register before and after the application of OOAF will be randomized to perceptual analyses that will be performed by three expert judges speech voice experience, double-blind. The parameters to be analyzed are overall grade voice quality, roughness, breathiness, tension, instability, resonance and articulation. Will also be held acoustic analysis parameters: jitter, shimmer and noise measurements: noise-harmonic ratio. The data will be statistically analyzed using parametric tests in order to compare data before and after the application of OOAF and compare the groups.