Department of Otorhinolaryngology/Phoniatrics, Klinikum rechts der Isar, Technical University Munich, Munich, Germany.
Fraunhofer Headquarters, Munich, Germany.
J Voice. 2020 May;34(3):335-345. doi: 10.1016/j.jvoice.2018.10.007. Epub 2018 Nov 15.
The study assessed 30 nonprofessional singers to evaluate the effects of vocal tract shape adjustment via increased resonance toward an externally applied sinusoidal frequency of 900 Hz without phonation. The amplification of the sound wave was used as biofeedback signal and the intensity and the formant position of the basic vowels /a/, /e/, /i/, /o/, and /u/ were compared before and after a vocal tract adjustment period. After the adjustment period, the intensities for all vowels increased and the measured changes correlated with the participants' self-perception.The diferences between the second formant position of the vowels and the applied frequency influences the changes in amplitude and in formant frequencies. The most significant changes in formant frequency occurred with vowels that did not include a formant frequency of 900 Hz, while the increase in amplitude was the strongest for vowels with a formant frequency of about 900 Hz.
本研究评估了 30 名非专业歌手，以评估在不发声的情况下通过增加共鸣将声道形状调整到 900Hz 的外部正弦频率的效果。声波的放大被用作生物反馈信号，比较了声道调整前后基本元音 /a/、/e/、/i/、/o/和 /u/的强度和共振峰位置。调整后，所有元音的强度都增加了，测量的变化与参与者的自我感知相关。元音的第二共振峰位置与施加频率之间的差异会影响幅度和共振峰频率的变化。在不包括 900Hz 共振峰频率的元音中，共振峰频率的变化最显著，而具有约 900Hz 共振峰频率的元音的幅度增加最强。
