Speech-Language Pathology Audiology Department at Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru (SP), Brazil.
Speech-Language Pathology Audiology Department at Universidade Federal de Sergipe, Lagarto (SE), Brazil.
J Voice. 2022 Jan;36(1):140.e29-140.e37. doi: 10.1016/j.jvoice.2020.04.008. Epub 2020 Jun 3.
The primary objective was to analyze and compare the effects of the voiced high-frequency oscillation (VHFO) and Lax Vox techniques in different performance times. The secondary objective was to determine if there were any differences between the exercises in men and women.
Thirty volunteers (15 male, 15 female) without vocal complaints or any history of dysphonia participated in this study. The volunteers performed the VHFO and the Lax Vox techniques with a week washout, and the performance times were 1- and 3-minute long with a 15-minute interval. They answered two questionnaires on vocal and laryngopharyngeal symptoms intensity self-assessment and had acoustic measurements (cepstral peak prominence-smoothed - CPPs - , alpha ratio, and L1-L0) obtained, before 1 minute (M0), after 1 minute (M1), and after 3 minutes (M3). They had their sustained vowel /a/ and number counting 1-10 recorded. Data were analyzed by using the repeated measures ANOVA (P < 0.05) and the post hoc Tukey's test.
For vowel /a/, men had higher CPPs and lower alpha ratio values. For number counting, men had lower CPPs values, and for both genders there was an improvement after M1, which remained at M3. For the low-pitched voice symptom, men showed a decrease after M1, regardless of the exercise. Men had better results after VHFO, while women had better results after the Lax Vox technique for the tightness symptom. Regardless of exercise or gender, there was a decrease in tickling and irritated throat after M1, but at M3 their intensity tended to increase. The lump in the throat symptom decreased at M1 and remained at the same intensity at M3 regardless of exercise or gender.
It is important to be aware of the voice effects and the patient reports when requesting 3 minutes of both exercises. Thus, the conclusion is that the best performance time is 1 minute. For most outcomes, there was no difference between exercises and participants' genders. However, for the low-pitched voice symptom, men benefited more from both exercises, and for tightness, men benefited more from VHFO; in contrast, women benefited more from the Lax Vox technique. Therefore, such gender differences should be considered when choosing these exercises.
主要目的是分析和比较有声高频振荡（VHFO）和松弛声门技术在不同表现时间的效果。次要目的是确定男性和女性之间的练习是否存在差异。
30 名志愿者（15 名男性，15 名女性）无嗓音投诉或任何声音障碍史参加了这项研究。志愿者用一周的洗脱期进行 VHFO 和松弛声门技术的练习，表现时间为 1 分钟和 3 分钟，间隔 15 分钟。他们回答了两个关于嗓音和喉咽症状强度自我评估的问卷，并在 1 分钟（M0）、1 分钟后（M1）和 3 分钟后（M3）进行了声学测量（谱峰突出度平滑-CPPs-、alpha 比和 L1-L0）。他们录制了持续元音/a/和数字 1-10 的计数。使用重复测量方差分析（P < 0.05）和事后 Tukey 检验分析数据。
对于元音/a/，男性的 CPPs 较高，alpha 比较低。对于数字计数，男性的 CPPs 值较低，两种性别在 M1 后都有所改善，在 M3 时仍保持不变。对于低音嗓音症状，男性在 M1 后下降，无论练习如何。男性在 VHFO 后效果更好，而女性在 Lax Vox 技术后效果更好紧张症状。无论练习或性别如何，M1 后喉咙瘙痒和刺痛的感觉减轻，但 M3 时其强度趋于增加。喉咙有异物感在 M1 时减少，在 M3 时无论练习或性别如何，其强度保持不变。
在要求进行两种练习 3 分钟时，注意声音效果和患者报告非常重要。因此，结论是最佳表现时间为 1 分钟。对于大多数结果，练习和参与者的性别之间没有差异。然而，对于低音嗓音症状，男性从两种练习中获益更多，对于紧张症状，男性从 VHFO 中获益更多；相比之下，女性从松弛声门技术中获益更多。因此，在选择这些练习时应考虑到这种性别差异。
