Boone D R, McFarlane S C
Department of Speech and Hearing Sciences, University of Arizona, Tucson 85721.
J Voice. 1993 Mar;7(1):75-80. doi: 10.1016/s0892-1997(05)80114-6.
The purpose of this study was to take a critical look at a voice therapy technique known as the yawn-sigh. The voiced sigh as an approach in voice therapy has had increased use in recent years, particularly with problems of vocal hyperfunction. In this study, the physiology of the yawn-sigh was studied with video nasoendoscopy in eight normal subjects; their taped voices were also studied acoustically for possible fundamental frequency and format changes in producing selected vowels under normal and sigh conditions. Although each subject was given a model by the examiner of a yawn-sigh, one of the eight subjects could not produce a true yawn-sigh. Endoscopic findings for seven of the eight subjects performing the yawn-sigh demonstrated retracted elevation of the tongue, a lower positioning of the larynx, and a widened pharynx. Acoustic analyses for the seven subjects producing the sigh found a marked lowering of the second and third formants. Implications for using the yawn-sigh in voice therapy are given, such as using a modified "silent" yawn-sigh, as an easy method for producing greater vocal tract relaxation.
本研究的目的是批判性地审视一种名为哈欠叹息法的嗓音治疗技术。作为嗓音治疗的一种方法，带声叹息近年来的应用越来越多，尤其是在嗓音功能亢进问题上。在本研究中，对8名正常受试者进行了视频鼻内镜检查，以研究哈欠叹息的生理学；还对他们的录音进行了声学研究，以探讨在正常和叹息条件下发出选定元音时可能出现的基频和共振峰变化。尽管每位受试者都由检查者示范了哈欠叹息的动作，但8名受试者中有1人无法发出真正的哈欠叹息。8名执行哈欠叹息动作的受试者中，有7人的内镜检查结果显示舌头回缩抬高、喉部位置降低以及咽部增宽。对发出叹息声的7名受试者进行的声学分析发现，第二和第三共振峰明显降低。文中给出了在嗓音治疗中使用哈欠叹息法的启示，比如使用改良的“无声”哈欠叹息法，作为一种使声道更容易放松的方法。
