Whistling has become more popular in recent years. “Whistling competitions” are being held in Japan since 2005. However, it can be difficult to teach some people how to whistle. One of the reasons is that theoretical information, including clear descriptions about how to whistle is scant. A better understanding of the principle would be beneficial to both the trainer and the trainee. In this study, the glottis opening area during whistling was measured via endoscopic imaging data. The amplitude characteristics of the vocal tract were determined by measuring the glottis opening area during whistling and calculating the transfer function of the vocal tract in conjunction with that area. By considering the glottis opening area, we could logically explain the fact that, in reality, some notes corresponding to theoretically calculated resonance frequencies did not occur, and we could obtain a calculation result that was close to the physical model. Furthermore, because the calculation result close to the physical model was only associated with certain glottis opening areas, it is evident that not only the shape of the vocal tract and the lip opening area, but also the glottis opening area is an important component of sound production during human whistling.

中文翻译：

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吹口哨时考虑声门开口面积的声道频率响应

近年来，吹口哨变得越来越流行。自2005年以来，日本一直在举办“吹口哨比赛”。但是，教导某些人如何吹口哨可能很难。原因之一是缺乏理论信息，包括关于如何吹口哨的清晰描述。更好地理解该原理将对培训师和受训人员都有益。在这项研究中，通过内窥镜成像数据测量了哨声时的声门张开面积。通过测量哨声期间的声门张开面积并结合该面积计算声道的传递函数，可以确定声道的振幅特性。通过考虑声门的开放区域，我们可以从逻辑上解释一个事实，即实际上 并未出现与理论上计算出的共振频率相对应的一些注释，因此我们可以获得的计算结果接近于物理模型。此外，由于接近于物理模型的计算结果仅与特定的声门张开面积相关，因此很明显不仅声门的形状和嘴唇的开口面积，而且声门张开面积也是声音的重要组成部分。吹口哨时的生产。