Department of Speech Hearing and Language Disorders, Faculdade de Odontologia de Bauru, Universidade de São Paulo, São Paulo, Brazil.
Speech-Language Pathology Audiology Department, Universidade Federal de Sergipe, Lagarto, Sergipe, Brazil.
J Voice. 2022 Mar;36(2):290.e17-290.e24. doi: 10.1016/j.jvoice.2020.05.004. Epub 2020 Jun 15.
To analyze the immediate effects of voiced high-frequency oscillation (VHFO) and Lax Vox technique on vocal quality and self-reported intensity of vocal and laryngeal symptoms in individuals with behavioral dysphonia.
This experimental, prospective, randomized cross-over study, investigated thirty adults (15 women and 15 men) with behavioral dysphonia (vocal complaints, altered voice on auditory-perceptual evaluation, vocal nodules or mucosal thickening, and incomplete glottic closure). The outcome variables analyzed were auditory-perceptual analysis, acoustic analysis (voice quality characteristics), and self-reported intensities of vocal and laryngeal symptoms. Each participant performed two exercises-VHFO and Lax Vox technique-in a random sequence for 3 minutes. A 7-day washout period was provided between the exercises. The data were analyzed using the paired t-test and Wilcoxon test (P < 0.05).
After VHFO, no significant difference was observed on auditory-perceptual evaluation in all participants, whereas the Lax Vox technique worsened breathiness among women (P = 0.027). VHFO significantly increased the fundamental frequency (P = 0.014) and decreased the noise harmonic ratios for women (P = 0.026). Among men, there was a decrease in shimmer parameter (P = 0.035). Moreover, symptoms such as "lump in the throat" (P = 0.005), "voice loss" (P = 0.017), and "high-pitched voice" (P = 0.023) decreased in women after VHFO, whereas in men, "itchiness" and "hoarseness" (P < 0.001) decreased after VHFO. The Lax Vox technique decreased "hoarseness" (P = 0.003) in women, without any effect in men.
The VHFO exercise provided more positive immediate effects results than the Lax Vox technique regarding vocal quality and self-reported symptom intensity in participants with behavioral dysphonia.
分析有声高频振荡（VHFO）和松弛发声技术对行为性发声障碍个体的嗓音质量以及嗓音和喉症状自我报告强度的即刻影响。
这是一项实验性、前瞻性、随机交叉研究，共纳入 30 名行为性发声障碍患者（15 名女性，15 名男性；嗓音抱怨，听觉感知评估时出现声音改变，声带小结或黏膜增厚，以及不完全声门闭合）。分析的结局变量包括听觉感知分析、声学分析（嗓音质量特征）以及嗓音和喉症状的自我报告强度。每位参与者以随机顺序分别进行 3 分钟的 VHFO 和松弛发声技术练习。两次练习之间提供 7 天的洗脱期。使用配对 t 检验和 Wilcoxon 检验（P<0.05）对数据进行分析。
在所有参与者中，VHFO 后听觉感知评估未见显著差异，而松弛发声技术使女性的粗糙声加重（P=0.027）。VHFO 显著增加女性的基频（P=0.014），降低女性的噪声-谐波比（P=0.026）。男性的颤抖参数降低（P=0.035）。此外，女性在接受 VHFO 后，“喉咙有异物感”（P=0.005）、“声音丧失”（P=0.017）和“高音调嗓音”（P=0.023）等症状减轻，而男性在接受 VHFO 后，“瘙痒”和“嘶哑”（P<0.001）减轻。松弛发声技术降低了女性的“嘶哑”（P=0.003），但对男性没有影响。
与松弛发声技术相比，VHFO 练习对行为性发声障碍患者的嗓音质量和自我报告的症状强度具有更积极的即刻效果。
