Departamento de Engenharia Mecânica, Universidade Federal de Santa Catarina, Campus Universitário Trindade, Florianópolis, Santa Catarina 88040-900, Brazil.
J Acoust Soc Am. 2023 Jun 1;153(6):3428. doi: 10.1121/10.0019683.
Tracheoesophageal (TE) speech is an important method of speech rehabilitation for those who undergo a total laryngectomy. Despite the many advantages over other methods, there is still room for improvement in terms of the overall quality of the TE voice as well as its success rate. These points could be greatly assisted by an improved knowledge on the mechanics of TE speech. Here, an experimental model of the pharyngoesophageal segment (PES), based on the idea of a collapsible tube, is proposed. To implement the model, considerable simplifications had to be made, most notably in the use of a thin flexible tube to represent the PES. The model was used to assess the minimum amount of tonicity required for the onset of phonation in terms of the flow rate and longitudinal tension. Additionally, comparisons with a mathematical model [Tourinho, da Silva, dos Santos, Thomaz, and Vieira, J. Acoust. Soc. Am. 149, 1979-1988 (2021)] have been made, yielding similar trends for sufficiently large flow rates. The measurements also suggest that the phonation frequency is most affected by the tonicity of the PES, which highlights the question of which physiological mechanism is responsible for the control of the fundamental frequency of phonation.
气管食管（TE）语音是全喉切除术后患者进行语音康复的重要方法。尽管该方法有许多优点，但在 TE 语音的整体质量和成功率方面仍有改进的空间。通过提高对 TE 语音力学的认识，可以极大地帮助解决这些问题。在这里，提出了一种基于可折叠管思想的咽食管段（PES）实验模型。为了实现该模型，必须进行大量简化，最显著的是使用薄而灵活的管来表示 PES。该模型用于评估在流速和纵向张力方面，发音开始所需的最小紧张度。此外，还与数学模型[Tourinho、da Silva、dos Santos、Thomaz 和 Vieira，J. Acoust. Soc. Am. 149, 1979-1988 (2021)]进行了比较，在足够大的流速下，这些模型呈现出相似的趋势。这些测量结果还表明，发声频率受 PES 紧张度的影响最大，这突出了哪个生理机制负责控制发声的基频的问题。
