Birk Veronika, Kniesburges Stefan, Semmler Marion, Berry David A, Bohr Christopher, Döllinger Michael, Schützenberger Anne
Division of Phoniatrics and Pediatric Audiology at the Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Erlangen, Medical School at Friedrich-Alexander-Universität Erlangen-Nürnberg, Waldstr. 1, 91054 Erlangen, Germany.
Laryngeal Dynamics Laboratory, Division of Head and Neck Surgery, David Geffen School of Medicine at UCLA, 10833 Le Conte Avenue, Los Angeles, California 90095-1624, USA.
J Acoust Soc Am. 2017 Oct;142(4):2197. doi: 10.1121/1.5007952.
Many cases of disturbed voice signals can be attributed to incomplete glottal closure, vocal fold oscillation asymmetries, and aperiodicity. Often these phenomena occur simultaneously and interact with each other, making a systematic, isolated investigation challenging. Therefore, ex vivo porcine experiments were performed which enable direct control of glottal configurations. Different pre-phonatory glottal gap sizes, adduction levels, and flow rates were adjusted. The resulting glottal closure types were identified in a post-processing step. Finally, the acoustic quality, aerodynamic parameters, and the characteristics of vocal fold oscillation were analyzed in reference to the glottal closure types. Results show that complete glottal closure stabilizes the phonation process indicated through a reduced left-right phase asymmetry, increased amplitude and time periodicity, and an increase in the acoustic quality. Although asymmetry and periodicity parameter variation covers only a small range of absolute values, these small variations have a remarkable influence on the acoustic quality. Due to the fact that these parameters cannot be influenced directly, the authors suggest that the (surgical) reduction of the glottal gap seems to be a promising method to stabilize the phonatory process, which has to be confirmed in future studies.
许多嗓音信号紊乱的病例可归因于声门闭合不完全、声带振动不对称以及非周期性。这些现象常常同时出现并相互作用，使得进行系统的、孤立的研究具有挑战性。因此，开展了猪离体实验，该实验能够直接控制声门形态。调整了不同的发声前声门间隙大小、内收程度和流速。在后期处理步骤中确定了由此产生的声门闭合类型。最后，参照声门闭合类型分析了声学质量、空气动力学参数以及声带振动特征。结果表明，完全声门闭合可稳定发声过程，这表现为左右相位不对称性降低、振幅和时间周期性增加以及声学质量提高。尽管不对称性和周期性参数变化仅涵盖一小范围的绝对值，但这些微小变化对声学质量有显著影响。由于这些参数无法直接受到影响，作者认为（手术）减小声门间隙似乎是稳定发声过程的一种有前景的方法，这有待未来研究加以证实。
