Higgins M B, Chait D H, Schulte L
Boys Town National Research Hospital, Omaha, NE 68131, USA.
J Speech Lang Hear Res. 1999 Feb;42(1):101-11. doi: 10.1044/jslhr.4201.101.
The purpose of this study was to determine if phonatory air flow characteristics differed among women with adductor spasmodic dysphonia (AdSD), muscle tension dysphonia (MTD), and normal phonation. Phonatory air flow signals were gathered during [pa] syllable repetitions. Mean phonatory air flow, coefficients of variation, and the presence of large air flow perturbations (75 ml/s or more) were examined for the three groups of speakers. There was no significant difference in mean phonatory air flow across groups, and very large intersubject variation in mean phonatory air flow occurred for both the AdSD and MTD groups. Coefficients of variation were similar for the groups of women with MTD and normal phonation but were significantly larger for the group with AdSD. Air flow perturbations were common with AdSD and rare with MTD. Relatively large coefficients of variation and air flow perturbations of at least 75 ml/s did occur for some women with normal voices who were 70 years of age or older. It appears that intrasubject variability in phonatory air flow may aid in the differentiation of AdSD and MTD when used in conjunction with other elements of a thorough voice evaluation. However, the potential contribution of aging to increased intrasubject variability in phonatory air flow must be considered when interpreting findings.
本研究的目的是确定内收型痉挛性发声障碍（AdSD）、肌张力障碍性发声障碍（MTD）的女性与发声正常的女性之间的发声气流特征是否存在差异。在重复发[pa]音节时收集发声气流信号。对三组受试者的平均发声气流、变异系数以及是否存在较大的气流扰动（75毫升/秒或更高）进行了检测。各组之间的平均发声气流没有显著差异，AdSD组和MTD组的平均发声气流都存在非常大的个体间差异。MTD组女性和发声正常组女性的变异系数相似，但AdSD组的变异系数显著更大。气流扰动在AdSD组很常见，在MTD组很少见。一些70岁及以上发声正常的女性确实出现了相对较大的变异系数和至少75毫升/秒的气流扰动。当与全面的嗓音评估的其他要素结合使用时，发声气流的个体内变异性似乎有助于区分AdSD和MTD。然而，在解释研究结果时，必须考虑衰老对发声气流个体内变异性增加的潜在影响。
