Fujiki Robert Brinton, Huber Jessica E, Sivasankar M Preeti
Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, Indiana, U.S.A.
Laryngoscope. 2021 Dec;131(12):2732-2739. doi: 10.1002/lary.29627. Epub 2021 May 19.
OBJECTIVES/HYPOTHESIS: To investigate the effects of acute vocal exertion on individuals with vocal fatigue and to determine whether semi-occluded vocal tract exercises (SOVTEs) are more effective than vocal rest in mitigating acute effects.
Prospective, repeated-measures design.
On consecutive days, 10 individuals (6 males, 4 females) with scores indicating vocal fatigue on the Vocal Fatigue Index completed two 10-minute vocal exertion tasks. Vocal rest or SOVTEs were interspersed in counterbalanced order between exertion tasks. Respiratory kinematic, acoustic, aerodynamic, and self-perceptual measures were collected at baseline, following vocal exertion, following SOVTE/vocal rest, and following the second exertion task.
Acute vocal exertion worsened phonation threshold pressure (P < .001) and vocal effort (P < .001) and reduced maximum fundamental frequency (P < .001). Speech was terminated at lower lung volumes following vocal exertion (decreased lung volume termination [LVT], P < .001). Exertion-induced changes in vocal effort and LVT were significantly reversed by both vocal rest and SOVTE. Detrimental changes in voice measures reoccurred following the second vocal exertion task. SOVTE and vocal rest protected against changes in respiratory kinematics when vocal exertion was resumed.
Vocal exertion impacted laryngeal, respiratory, and self-perceptual measures in individuals with vocal fatigue. Both SOVTE and vocal rest partially mitigated changes in voice measures and prompted more efficient respiratory strategies that were maintained when vocal exertion resumed. These data increase our understanding of how individuals with vocal fatigue respond to vocal exertion tasks and offer preliminary guidance for optimal clinical recommendations.
3 Laryngoscope, 131:2732-2739, 2021.
目的/假设：研究急性发声用力对有嗓音疲劳的个体的影响，并确定半阻塞声道练习（SOVTEs）在减轻急性影响方面是否比嗓音休息更有效。
前瞻性重复测量设计。
连续数天，10名在嗓音疲劳指数上得分表明有嗓音疲劳的个体（6名男性，4名女性）完成两项10分钟的发声用力任务。嗓音休息或SOVTEs以平衡的顺序穿插在用力任务之间。在基线、发声用力后、SOVTE/嗓音休息后以及第二次用力任务后收集呼吸运动学、声学、空气动力学和自我感知测量数据。
急性发声用力使发声阈压恶化（P < 0.001）、发声努力程度增加（P < 0.001）并降低了最大基频（P < 0.001）。发声用力后语音在较低肺容量时终止（肺容量终止[LVT]降低，P < 0.001）。发声用力引起的发声努力程度和LVT的变化通过嗓音休息和SOVTE均得到显著逆转。第二次发声用力任务后，嗓音测量的有害变化再次出现。当恢复发声用力时，SOVTE和嗓音休息可防止呼吸运动学的变化。
发声用力影响了有嗓音疲劳个体的喉部、呼吸和自我感知测量指标。SOVTE和嗓音休息均部分减轻了嗓音测量指标的变化，并促使在恢复发声用力时维持更有效的呼吸策略。这些数据增进了我们对有嗓音疲劳的个体如何应对发声用力任务的理解，并为最佳临床建议提供了初步指导。
3 喉镜，131:2732 - 2739, 2021
