Döllinger Michael, Berry David A, Montequin Douglas W
Laryngeal Dynamics Laboratory, Division of Head & Neck Surgery, UCLA School of Medicine, Los Angeles, California.
Otolaryngol Head Neck Surg. 2006 Nov;135(5):724-729. doi: 10.1016/j.otohns.2006.04.007.
This study investigated the influence of epilarynx area on an excised human vocal fold during phonation.
A hemilarynx set-up using an excised human larynx was used. An artificial vocal tract with an epilarynx tube of variable cross-sectional area was attached. High-speed imaging was performed and standard phonatory variables were measured.
Glottal airflow, fundamental frequency, and sound level increased as a function of subglottal pressure. A decrease in epilarynx area decreased phonation threshold pressure, glottal airflow, and vocal fold displacements and velocities.
Preliminary experimental results confirm that narrowing the epilarynx area facilitates phonation by decreasing phonation threshold pressure, presumably through impedance matching of the glottal source and vocal tract.
As this phenomenon associated with epilarynx narrowing is further quantified and generalized, eventually new surgical alterations of the epilaryngeal structure may be suggested to facilitate phonation, in addition to standard phonosurgical procedures.
本研究调查了喉上区域对离体人声带发声时的影响。
采用使用离体人喉的半喉装置。连接一个带有可变横截面积喉上管的人工声道。进行高速成像并测量标准发声变量。
声门气流、基频和声强随声门下压力的增加而增加。喉上区域的减小降低了发声阈压力、声门气流以及声带的位移和速度。
初步实验结果证实，缩小喉上区域可通过降低发声阈压力来促进发声，推测是通过声门源和声道的阻抗匹配实现的。
随着与喉上变窄相关的这一现象得到进一步量化和推广，最终除了标准的嗓音外科手术外，可能会提出新的喉上结构手术改变方法来促进发声。
