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  • Title: The Voiced Oral High-frequency Oscillation Technique's Immediate Effect on Individuals With Dysphonic and Normal Voices.
    Author: Saters TL, Ribeiro VV, Siqueira LTD, Marotti BD, Brasolotto AG, Silverio KCA.
    Journal: J Voice; 2018 Jul; 32(4):449-458. PubMed ID: 28844805.
    Abstract:
    OBJECTIVE: The aim of this study was to verify the effect of the voiced oral high-frequency oscillation (VOHFO) on voice quality in acoustic voice symptoms and self-reported sensations in individuals with voice complaints and dysphonic voices, and in individuals with normal voices. METHODS: The participants, which included 60 individuals from 18 to 45 years of age, both genders, were divided into two groups: G1, 30 individuals without voice complaints and normal voices; and G2, 30 individuals with voice complaints and dysphonic voices. We used the following measures: acoustic analysis, voice and larynx symptom investigation, and phonation time before and after 3 minutes of performing the VOHFO technique. The sensations were reported only after the VOHFO technique. Data were analyzed using the Wilcoxon test (P ≤ 0.05), paired t test (P ≤ 0.05), and the Mann-Whitney test (P ≤ 0.05). RESULTS: After the VOHFO, in G1, there was an increased fundamental frequency (both genders), a higher voice turbulence index, and a decrease in dryness symptoms (women); in G2, there was a decrease in the following symptoms: strong voice, dryness and lump in the throat, sensitive throat (women), and roughness and weak voice (men). The phonation measures and sensations did not present differences. The soft phonation index decreased in G1 and increased in G2 (women), in addition to a significant decrease in strong voice and sensitive throat (women) and roughness (men) in G2. CONCLUSIONS: The VOHFO technique improves the source-filter relationship and the severity of voice and larynx symptoms in dysphonic and normal individuals. Women improved more in terms of larynx symptoms, whereas men improved more in terms of voice symptoms.
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