Herbst Christian T, Elemans Coen P H, Tokuda Isao T, Chatziioannou Vasileios, Švec Jan G
Department of Vocal Studies, Mozarteum University, Salzburg, Austria; Janette Ogg Voice Research Center, Shenandoah Conservatory, Winchester, Virginia. Electronic address: http://www.christian-herbst.org.
Vocal Neuromechanics Lab, Department of Biology, University of Southern Denmark, Odense M, Denmark.
J Voice. 2025 Mar;39(2):304-316. doi: 10.1016/j.jvoice.2022.10.004. Epub 2023 Feb 1.
Voice is a major means of communication for humans, non-human mammals and many other vertebrates like birds and anurans. The physical and physiological principles of voice production are described by two theories: the MyoElastic-AeroDynamic (MEAD) theory and the Source-Filter Theory (SFT). While MEAD employs a multiphysics approach to understand the motor control and dynamics of self-sustained vibration of vocal folds or analogous tissues, SFT predominantly uses acoustics to understand spectral changes of the source via linear propagation through the vocal tract. Because the two theories focus on different aspects of voice production, they are often applied distinctly in specific areas of science and engineering. Here, we argue that the MEAD and the SFT are linked integral aspects of a holistic theory of voice production, describing a dynamically coupled system. The aim of this manuscript is to provide a comprehensive review of both the MEAD and the source-filter theory with its nonlinear extension, the latter of which suggests a number of conceptual similarities to sound production in brass instruments. We discuss the application of both theories to voice production of humans as well as of animals. An appraisal of voice production in the light of non-linear dynamics supports the notion that it can be best described with a systems view, considering coupled systems rather than isolated contributions of individual sub-systems.
声音是人类、非人类哺乳动物以及许多其他脊椎动物（如鸟类和无尾两栖类动物）的主要交流方式。声音产生的物理和生理原理由两种理论描述：肌弹性 - 空气动力学（MEAD）理论和源 - 滤波器理论（SFT）。虽然MEAD采用多物理方法来理解声带或类似组织的自激振动的运动控制和动力学，但SFT主要使用声学来理解通过声道的线性传播时源的频谱变化。由于这两种理论关注声音产生的不同方面，它们在科学和工程的特定领域中常常被分别应用。在此，我们认为MEAD和SFT是声音产生整体理论中相互关联的组成部分，描述了一个动态耦合系统。本手稿的目的是对MEAD和源 - 滤波器理论及其非线性扩展进行全面综述，后者与铜管乐器的声音产生有许多概念上的相似之处。我们讨论了这两种理论在人类以及动物声音产生中的应用。根据非线性动力学对声音产生进行评估支持了这样一种观点，即从系统的角度来看，考虑耦合系统而非单个子系统的孤立贡献，才能最好地描述声音产生。
