Fraunhofer Headquarters, Munich, Germany.
Department of Otorhinolaryngology/Phoniatrics, Klinikum rechts der Isar, Technical University Munich, Munich, Germany.
J Voice. 2019 Jul;33(4):482-489. doi: 10.1016/j.jvoice.2018.01.018. Epub 2018 Feb 14.
In this study, an adjustment of the vocal tract shape toward selected sound waves in the frequency range of the first and second formants without phonation is discussed. The sound waves of a loudspeaker in front of the open mouth and amplified by the vocal tract are used as biofeedback signals. It is shown that the resonance amplification of the vocal tract complies with the concept of forced oscillation, with the driver being the sound source and the resonator being the vocal tract. An adjustment toward increased amplification via vocal tract resonance can be related to smaller bandwidths and lower damping. Furthermore, the applied adjustment frequencies are preserved as vocal tract resonances during exhalation and even phonation. This novel form of biofeedback might enrich standard voice training procedures by exercises without phonation.
本研究讨论了在不发声的情况下，对声道形状进行调整，以使其与第一和第二共振峰频率范围内的选定声波相匹配。扬声器发出的声波在口腔前放大，并用作生物反馈信号。结果表明，声道的共振放大符合强制振荡的概念，其中驱动器是声源，而谐振器是声道。通过声道共振进行的放大调整可以与较小的带宽和较低的阻尼相关。此外，在呼气甚至发声期间，应用的调整频率都会作为声道共振而被保留下来。这种新形式的生物反馈可以通过不发声的练习来丰富标准的语音训练程序。
