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婴儿哭泣中的空气动力学和声学力量
1Utah Center for Vocology, University of Utah, Salt Lake City, UT; National Center for Voice and Speech, Salt Lake City, UT.
Journal of voice : official journal of the Voice Foundation
|January 9, 2025
概括
婴儿的哭声通过高的肺压力和阻抗匹配来达到与成人类似的功率水平,补偿较小的声道. 这种天生的能力确保了有效的声音生产通信.
科学领域:
- 婴儿发声的声学和空气动力学分析.
- 生物声学和语言生产的生理建模.
背景情况:
- 婴儿的哭声力不会随着身体或声道的大小而变大.
- 了解婴儿声力背后的机制对于发育研究至关重要.
研究的目的:
- 为了证明婴儿如何达到与成年人相比的声力水平.
- 为了研究高肺压力和阻抗匹配在婴儿哭泣中的作用.
主要方法:
- 使用计算模型分析婴儿呼吸道内的功率分布.
- 关键参数包括喉和腹腔横截面区域,对于非发声的婴儿哭声至关重要.
主要成果:
- 气动力学功率达到1.0W,肺压力为70厘米的H2O.
- 辐射的声功率高达1.0mW (30厘米处90dB),有喉粗的证据.
结论:
- 婴儿具有高肺压的天生的能力,克服了小声道的空气流量减少.
- 婴儿的气流阻抗大约是成年人的100倍.
- 发声的最佳能量转移似乎是人类婴儿的一种先天性质.
关键词:
婴儿的哭空气动力功率声学功率.
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