The effects of excessive vocalization on acoustic and videostroboscopic measures of vocal fold condition
The effects of excessive vocalization on acoustic and videostroboscopic measures of vocal fold condition
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DOI：
10.1016/s0892-1997(99)80035-6
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发表时间：
1999-06-01
期刊：
影响因子：
2.2
通讯作者：
Patow, C
中科院分区：
文献类型：
--
作者：
Mann, EA;McClean, MD;Patow, C
虽然发声困难是公认的急性发声滥用的后果，但声带外观和功能的相关变化尚未得到很好的理解。为了记录这些假设的影响，声音滥用，持续元音生产的录音，获得42演习中士每天在第一个6天的一个声音要求很高的训练演习。声学分析显示，42名受试者中有16名在第1天出现异常水平的抖动和闪烁。仅考虑在第1天显示正常声音声学的26名受试者，抖动和闪烁的中值水平在训练过程中变化很小，并且在研究期间未观察到抖动和闪烁的显著增加。然而，抖动和闪烁的分布变得更加正偏，并且在训练过程中显示出更多的正离群值。这一趋势归因于11例受试者在第2天至第6天出现两次或多次异常声音声学事件。喉视频频闪记录持续元音生产之前和之后的培训。由2名观察员对这些记录进行的感知评级显示，在5天的训练期后，声带水肿、红斑和边缘不规则性显著增加，声带粘膜波和偏移幅度降低。一般来说，在训练过程中，声学和视频频闪镜效应的程度存在相当大的受试者间差异。这两种类型的数据，视频频闪镜似乎提供了一个更敏感的指示过度发声的影响。
Although dysphonia is a recognized consequence of acute vocal abuse, associated changes in vocal fold appearance and function are not well understood. To document these presumed effects of vocal abuse, audio recordings of sustained vowel production were obtained from 42 drill sergeants daily during the first 6 days of a vocally demanding training exercise. Acoustic analysis showed abnormal levels of jitter and shimmer on Day 1 in 16 of the 42 subjects. Considering only the 26 subjects who showed normal voice acoustics on Day 1, the median levels of jitter and shimmer varied little over the course of training, and significant increases in jitter and shimmer were not seen during the study period. However, the distributions for both jitter and shimmer became more positively skewed and showed a greater number of positive outliers over the course of training. This trend was attributed to 11 subjects who showed two or more instances of abnormal voice acoustics over Days 2 through 6. Laryngeal videostroboscopic recordings of sustained vowel production also were obtained prior to and following training. Perceptual ratings of these recordings by 2 observers revealed significant increases in vocal fold edema, erythema, and edge irregularity, and decreases in vocal fold mucosal wave and amplitude of excursion following the 5-day training period. In,general, there was considerable intersubject variability in the extent of acoustic and videostroboscopic effects over the course of training. Of the two types of data, videostroboscopy appears to provide a more sensitive indication of the effects of excessive vocalization.