Kang Jing, Scholp Austin, Tangney Jacob, Jiang Jack J
Department of Otolaryngology-Head and Neck Surgery, EENT Hospital of Fudan University, Shanghai, 200031, China.
Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, School of Medicine and Public Health, University of Wisconsin-Madison, 1300 University Avenue, 2745 Medical Sciences Center, Madison, WI, 53706, USA.
Eur Arch Otorhinolaryngol. 2019 Feb;276(2):473-482. doi: 10.1007/s00405-018-5247-2. Epub 2019 Jan 10.
This study investigated the effects of straw phonation therapy on the aerodynamic and acoustic parameters of the vocal folds at different levels of elongation and subglottal pressure.
20 excised canine larynges were used in both experimental (straw phonation therapy simulation) and control conditions. Aerodynamic parameters, including phonation threshold pressure (PTP), phonation instability pressure (PIP), phonation pressure range (PPR), phonation threshold flow (PTF), phonation instability flow (PIF), phonation flow range (PFR), were obtained at different levels of vocal fold elongation (0%, 10%, 20%). Acoustic parameters, including fundamental frequency (F0), jitter, shimmer, signal noise ratio (SNR) were detected at different levels of vocal fold elongation (0%, 10%, 20%) and subglottal pressure (15 cmHO, 20 cmHO, 25 cmHO).
Significant decreases in PTP and PTF and significant increases in PIP, PIF, PPR, and PFR occurred in experimental condition at all levels of elongation when compared with control condition. However, no significant changes of acoustic parameters were obtained between conditions at all levels.
At different levels of vocal fold elongation, straw phonation not only lowered the onset of normal voice, but also elevated the onset of chaotic voice, indicating a better voice economy and voice control. Moreover, the improved phonatory range demonstrated that straw phonation had the potential to prevent voice users who have high voice demand from voice fatigue and vocal damage.
本研究调查了吸管发声疗法在不同声带伸长程度和声门下压力水平下对声带空气动力学和声学参数的影响。
在实验（模拟吸管发声疗法）和对照条件下使用20个切除的犬类喉部。在不同的声带伸长程度（0%、10%、20%）下获取空气动力学参数，包括发声阈压（PTP）、发声不稳定压（PIP）、发声压力范围（PPR）、发声阈流（PTF）、发声不稳定流（PIF）、发声流范围（PFR）。在不同的声带伸长程度（0%、10%、20%）和声门下压力（15 cmHO、20 cmHO、25 cmHO）下检测声学参数，包括基频（F0）、抖动、闪烁、信噪比（SNR）。
与对照条件相比，在所有伸长程度水平下的实验条件中，PTP和PTF显著降低，PIP、PIF、PPR和PFR显著增加。然而，在所有水平条件之间未获得声学参数的显著变化。
在不同的声带伸长程度下，吸管发声不仅降低了正常声音的起始，还提高了混沌声音的起始，表明更好的发声经济性和发声控制。此外，改善的发声范围表明吸管发声有潜力防止对嗓音要求高的使用者出现嗓音疲劳和声带损伤。
