Meerschman Iris, Van Lierde Kristiane, Van Puyvelde Caro, Bostyn Astrid, Claeys Sofie, D'haeseleer Evelien
Department of Speech-Language and Hearing Sciences, Ghent University, Ghent, Belgium.
Department of Speech-Language Pathology and Audiology, University of Pretoria, Pretoria, South Africa.
Int J Lang Commun Disord. 2018 Mar;53(2):393-404. doi: 10.1111/1460-6984.12358. Epub 2017 Dec 5.
In contrast with most medical and pharmaceutical therapies, the optimal dosage for voice therapy or training is unknown.
The aim of this study was to compare the effect of a short-term intensive voice training (IVT) with a longer-term traditional voice training (TVT) on the vocal quality and vocal capacities of vocally healthy non-professional voice users.
METHODS & PROCEDURES: A pre-/post-test randomized control group design with follow-up measurements was used. Twenty healthy female non-professional voice users with a mean age of 21.7 years (range = 20-24 years) were randomly assigned into a short-term IVT group (n = 10) or a longer-term TVT group (n = 10). Both groups received an identical 6-h lasting voice training. Only the distribution of practice varied between the groups: 2 h a day for 3 consecutive days for the IVT group versus two 30-min sessions a week for 6 weeks for the TVT group. In both groups, a voice assessment protocol consisting of subjective (questionnaire, participant's self-report, auditory-perceptual evaluation) and objective (maximum performance task, acoustic analysis, voice range profile, dysphonia severity index) measurements and determinations was used to evaluate the participants' voice pre- and post-training and at 6 weeks follow-up. Groups were compared over time using linear mixed models and generalized linear mixed models. Within-group effects of time were determined using post-hoc pairwise comparisons with Bonferroni corrections.
OUTCOMES & RESULTS: No significant time-by-group interactions were found for any of the outcome measures, indicating no significant differences in evolution over time between the groups. Significant time effects were found for maximum phonation time, lowest intensity, lowest frequency, highest frequency and dysphonia severity index, all improving over time in both groups. More in-depth within-group analyses indicate a preference for the IVT group regarding the evolution of maximum phonation time, lowest frequency and dysphonia severity index, and a preference for the TVT group regarding the evolution of lowest intensity.
CONCLUSIONS & IMPLICATIONS: Short-term IVT may be equally, or even more, effective in training vocally healthy non-professional voice users compared with longer-term TVT.
与大多数医学和药物疗法不同，嗓音治疗或训练的最佳剂量尚不清楚。
本研究的目的是比较短期强化嗓音训练（IVT）与长期传统嗓音训练（TVT）对嗓音健康的非专业嗓音使用者的嗓音质量和嗓音能力的影响。
采用前后测随机对照组设计并进行随访测量。20名平均年龄为21.7岁（范围=20 - 24岁）的健康女性非专业嗓音使用者被随机分为短期IVT组（n = 10）或长期TVT组（n = 10）。两组均接受相同的为期6小时的嗓音训练。两组之间仅练习分布不同：IVT组连续3天每天2小时，而TVT组每周两次30分钟课程，共6周。在两组中，使用由主观（问卷、参与者自我报告、听觉感知评估）和客观（最大表现任务、声学分析、嗓音范围剖面图、发声障碍严重程度指数）测量和测定组成的嗓音评估方案来评估参与者训练前、训练后以及6周随访时的嗓音情况。使用线性混合模型和广义线性混合模型对两组随时间进行比较。组内时间效应通过使用Bonferroni校正的事后两两比较来确定。
在任何结果测量中均未发现显著的组间时间交互作用，表明两组随时间的变化无显著差异。在最大发声时间、最低强度、最低频率、最高频率和发声障碍严重程度指数方面发现了显著的时间效应，两组这些指标均随时间改善。更深入的组内分析表明，在最大发声时间、最低频率和发声障碍严重程度指数的变化方面，IVT组更具优势，而在最低强度的变化方面，TVT组更具优势。
与长期TVT相比，短期IVT在训练嗓音健康的非专业嗓音使用者方面可能同样有效，甚至更有效。
