一个紧的低频声学完美吸收器,用折叠的隙构建
Han Wang1, Pengwei Ma1, Xueling Fan1
1Xi'an Key Laboratory of Extreme Environment and Protection Technology, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Materials (Basel, Switzerland)
|December 17, 2024
概括
研究人员开发了一种新的折叠裂纹声学吸收器,用于高效,可调节的声音吸收. 这种薄型设备在低频率下实现了近乎完美的吸收,为先进的声学应用提供了显著的潜力.
科学领域:
- 声学 声学 在声学上
- 材料科学 材料科学 材料科学
- 超材料是什么?超材料是什么?
背景情况:
- 低波长的声学吸收对于各种应用至关重要.
- 现有的超材料面临的挑战是,在统一的,有限的尺寸下实现可调节的吸收.
研究的目的:
- 引入一种新的折叠裂结构,用于增强的微裂声吸收器.
- 为了证明可调节的低频声吸收,使用薄吸收器.
主要方法:
- 设计和制造了一种微裂声学吸收器,其中包含一个折叠的裂.
- 通过调整折叠面积的参数来研究声音吸收性能.
主要成果:
- 在厚度为3.1厘米时,达到0.99的近乎完美的声吸收系数.
- 通过调整两个参数,证明了可调节的共振频率 (525673 Hz) 和可调节的吸收带宽 (56.5%60.2%).
- 在低频域观察到增强的宽带吸收能力.
结论:
- 折叠裂纹吸收器提供高效,可调和的宽带低频声音吸收.
- 该设计为开发高效,薄,可调节的吸声器提供了一个有前途的途径.
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