Graduate School of Science and Engineering, Ritsumeikan University, Noji-higashi, Kusatsu, Shiga 525-8577, Japan.
College of Science and Engineering, Ritsumeikan University, Noji-higashi, Kusatsu, Shiga 525-8577, Japan.
JASA Express Lett. 2022 Nov;2(11):111201. doi: 10.1121/10.0015071.
The vocal membrane, i.e., an extended part of the vocal fold, is observed in a wide range of species including bats and primates. A theoretical study [Mergell, Fitch, and Herzel (1999). J. Acoust. Soc. Am. 105(3), 2020-2028] predicted that the vocal membranes can make the animal vocalizations more efficient by lowering the phonation threshold pressure. To examine this prediction, a synthetic model of the vocal membrane was developed, and its oscillation properties were examined. The experiments revealed that the phonation threshold pressure was lower in the vocal membrane model compared to that in a model with no vocal membrane. Chaotic oscillations were observed as well.
声膜，即声带的延伸部分，在包括蝙蝠和灵长类动物在内的众多物种中都有观察到。一项理论研究[Mergell、Fitch 和 Herzel（1999）。J. Acoust. Soc. Am. 105(3), 2020-2028]预测，声膜可以通过降低发音阈值压力使动物的叫声更有效。为了检验这一预测，开发了一个声膜的合成模型，并对其振动特性进行了研究。实验表明，与没有声膜的模型相比，声膜模型的发音阈值压力更低。同时还观察到了混沌振动。
