Hancock Adrienne B, Gross Heather E
Department of Speech and Hearing Sciences, George Washington University, Washington, District of Columbia.
Department of Speech and Hearing Sciences, George Washington University, Washington, District of Columbia.
J Voice. 2015 Jan;29(1):53-8. doi: 10.1016/j.jvoice.2014.04.005. Epub 2014 Jun 13.
Known influences of sex hormones on the voice would suggest pregnancy hormones could have an effect, yet studies using acoustic measures have not indicated changes. Additionally, no examination of the voice before the third trimester has been reported. Effect of pregnancy on the voice is relatively unexplored yet could be quite relevant to female speakers and singers.
OBJECTIVES/HYPOTHESIS: It is possible that spectral and aerodynamic measures would be more sensitive to tissue-level changes caused by pregnancy hormones.
DESIGN/METHODS: In this first longitudinal study of a 32-year-old woman's pregnancy, weekly voice samples were analyzed for acoustic (fundamental frequency, perturbation ratios of shimmer and jitter, Harmonic-to-Noise Ratio, spectral measures, and maximum phonation time) and aerodynamic (average airflow, peak flow, AC/DC ratio, open quotient, and speed quotient) parameters.
All measures appeared generally stable during weeks 11-39 of pregnancy compared with 21 weeks postpartum. Slight decrease in minimum airflow and open speed quotient may reflect suspected vocal fold tissue changes.
It is recommended that future studies monitor and test correlations among hormone levels, visual analyses of vocal fold mucosa, aerodynamic function, and glottal efficiency.
已知性激素对嗓音有影响，这表明妊娠激素可能也有作用，但采用声学测量方法的研究并未显示出变化。此外，尚无关于妊娠晚期之前嗓音情况的研究报告。妊娠对嗓音的影响相对未被充分探索，但这可能与女性说话者和歌手密切相关。
目的/假设：频谱和空气动力学测量方法可能对妊娠激素引起的组织水平变化更为敏感。
设计/方法：在这项针对一名32岁女性孕期的首次纵向研究中，每周采集嗓音样本，分析其声学参数（基频、微扰比、谐噪比、频谱测量以及最长发声时间）和空气动力学参数（平均气流、峰值气流、交流/直流比、开放商数和速度商数）。
与产后21周相比，妊娠11至39周期间所有测量结果总体上较为稳定。最小气流和开放速度商数略有下降，这可能反映了疑似声带组织的变化。
建议未来的研究监测并测试激素水平、声带黏膜的视觉分析、空气动力学功能和声门效率之间的相关性。
