Modeling the role of nonhuman vocal membranes in phonation
Modeling the role of nonhuman vocal membranes in phonation
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DOI：
10.1121/1.426735
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发表时间：
1999-03-01
影响因子：
2.4
通讯作者：
Herzel, H
中科院分区：
文献类型：
--
作者：
Mergell, P;Fitch, WT;Herzel, H
尽管与其他类群（鸟类或昆虫）的发声器官相比，哺乳动物的喉部在结构上几乎没有变化，但它们的一些形态学特征可能导致它们在声学功能上的显著差异，比如气囊和声膜。声带膜（或“声带唇”）是一种薄薄的向上延伸的声带，存在于许多蝙蝠和灵长类物种中。在喉部的双质量模型中，声膜被建模为一个额外的几何元素。研究发现，最佳角度和长度的声膜可以大大降低声门下压力，从而提高发声效率，并且这种效果在高频率时最为明显。研究人员还讨论了这一发现对蝙蝠和灵长类动物的影响，这些动物能够发出响亮、高音调的叫声。这样的建模工作为未来声膜结构和功能的实证研究提供了指导，可以深入了解动物交流的机制，并可能有助于更好地理解人类临床疾病，如声沟。(C) 1999美国声学学会。[s0001 - 4966(99) 03602 - 4]。
Although the mammalian larynx exhibits little structural variation compared to sound-producing organs in other taxa (birds-or insects), there are some morphological features which could lead to significant differences in acoustic functioning, such as air sacs and Vocal membranes. The vocal membrane (or "vocal lip'') is a thin upward extension of the vocal fold that is present in many bat and primate species. The vocal membrane was modeled as an additional geometrical element in a two-mass model of the larynx. It was found that vocal membranes of an optimal angle and length can substantially lower the subglottal pressure at which phonation is supported, thus increasing vocal efficiency, and that this effect is most pronounced at high frequencies. The implications of this finding are discussed for animals such as bats and primates which are able to produce loud, high-pitched calls. Modeling efforts such as this provide guidance for future empirical investigations of vocal membrane structure and function, can provide insight into the mechanisms of animal communication, and could potentially lead to better understanding of human clinical disorders such as sulcus vocalis. (C) 1999 Acoustical Society of America. [S0001-4966(99)03602-4].