Vertigan Anne E, Theodoros Deborah G, Winkworth Alison L, Gibson Peter G
Speech Pathology Department, Hunter Medical Research Institute, John Hunter Hospital, University of Newcastle, Newcastle, Australia.
Folia Phoniatr Logop. 2008;60(4):210-6. doi: 10.1159/000136902. Epub 2008 Jun 5.
Chronic cough (CC) and paradoxical vocal fold movement (PVFM) may be associated with voice problems. Objective acoustic and electroglottographic (EGG) measures have the capacity to delineate these vocal characteristics. This study investigated acoustic and EGG voice features of CC and PVFM.
Acoustic and EGG findings were compared among 5 groups of participants. The first 3 groups, CC (n = 56), PVFM (n = 8) and combined CC-PVFM (n = 55), included individuals with cough and respiratory symptoms that persisted despite medical treatment. Groups 4 and 5 included individuals with muscle tension dysphonia (n = 25) and healthy controls (n = 27).
Participants with CC/PVFM recorded reduced phonation times (p < 0.001), greater jitter (p < 0.001), reduced harmonic to noise ratio (p = 0.001), reduced phonation range (p = 0.007) and shorter closed phase of vocal fold vibration (p = 0.006) in comparison to healthy controls. Females with CC had reduced fundamental frequency in connected speech (p = 0.009). There was consistent overlap between the participants with CC and those with PVFM. Duration of closed phase and fundamental frequency were lower in the participants with CC and PVFM than in those with muscle tension dysphonia.
These results confirm abnormalities in acoustic and EGG voice features in CC and PVFM.
慢性咳嗽（CC）和矛盾性声带运动障碍（PVFM）可能与嗓音问题有关。客观声学和电声门图（EGG）测量方法有能力描绘这些嗓音特征。本研究调查了CC和PVFM的声学和EGG嗓音特征。
比较了5组参与者的声学和EGG检查结果。前三组，即CC组（n = 56）、PVFM组（n = 8）和CC-PVFM联合组（n = 55），包括尽管接受了药物治疗但咳嗽和呼吸道症状仍持续存在的个体。第4组和第5组包括肌肉紧张性发声障碍患者（n = 25）和健康对照者（n = 27）。
与健康对照者相比，CC/PVFM参与者的发声时间缩短（p < 0.001）、抖动增加（p < 0.001）、谐波噪声比降低（p = 0.001）、发声范围减小（p = 0.007）以及声带振动的闭合期缩短（p = 0.006）。患有CC的女性在连贯言语中的基频降低（p = 0.009）。CC参与者和PVFM参与者之间存在持续的重叠。CC和PVFM参与者的闭合期持续时间和基频低于肌肉紧张性发声障碍患者。
这些结果证实了CC和PVFM在声学和EGG嗓音特征方面存在异常。
