Sapienza C M, Murry T, Brown W S
Department of Communication Sciences and Disorders, University of Florida, Gainesville, Florida 36207, USA.
J Voice. 1998 Jun;12(2):214-22. doi: 10.1016/s0892-1997(98)80041-6.
Acoustic analysis was used to gain information about the normal, as well as the abnormal acoustic events associated with adductor spasmodic dysphonia (ADSD). This analysis was completed to determine whether specific acoustic events could be used to differentiate the voice of individuals with ADSD from those with normal voice. A group comparison between 14 women diagnosed with ADSD and 14 women (age-matched) with no evidence of vocal pathology or vocal dysfunction was completed. Phonatory breaks, aperiodicity, and frequency shifts, acoustic parameters previously identified in ADSD, were found throughout sustained vowel productions. The duration of the phonatory breaks and aperiodic segments was calculated and the amount of frequency shift was determined. The location of each acoustic event was marked relative to the onset of the vowel production. The subjects with ADSD presented with normal phonation and various amounts of each of the three acoustic parameters. Aperiodic segments primarily characterized the phonation of ADSD, followed by frequency shifts and phonatory breaks. The location of each of these acoustic events was within the midportion of the vowel production. The advantages of segmenting the acoustic waveform into these measures and separating the spasmodic events from normal phonation when examining laryngeal motor control of spasmodic dysphonics is discussed.
声学分析被用于获取与内收型痉挛性发声障碍（ADSD）相关的正常以及异常声学事件的信息。完成该分析是为了确定特定的声学事件是否可用于区分ADSD患者与嗓音正常者的声音。对14名被诊断为ADSD的女性和14名（年龄匹配）无嗓音病理学证据或嗓音功能障碍的女性进行了组间比较。在持续元音发声过程中发现了之前在ADSD中确定的声学参数——发声中断、非周期性和频率变化。计算了发声中断和非周期性片段的持续时间，并确定了频率变化量。每个声学事件的位置相对于元音发声的起始点进行标记。ADSD患者表现出正常发声以及三种声学参数各自不同程度的情况。非周期性片段是ADSD发声的主要特征，其次是频率变化和发声中断。这些声学事件中的每一个的位置都在元音发声的中间部分。文中讨论了在检查痉挛性发声障碍患者的喉运动控制时，将声学波形分割为这些测量指标并将痉挛性事件与正常发声分离的优点。
