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首页> 外文会议>International Congress on Acoustics >Drinking Straws as a Broadband Sound Absorber
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Drinking Straws as a Broadband Sound Absorber

机译：吸管作为宽带吸声器

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The range of products developed by the most common absorption principles that fulfil high performance tuned to specific frequencies, low price, sustainability and aesthetic quality is often limited to porous materials. The quarter wavelength tube principle may perform well, even in low frequencies, but in a narrow frequency range. To widen the range, multiple tubes can be tuned to multiple frequencies by choosing combinations of lengths and diameters. If designed properly, less material is needed thus lower price and tubes can be easily re-used. Based on a research through design method a more broadband sound absorber using drinking straws has been developed. Measurements of the normal incidence sound absorption coefficient were performed in an impedance tube and compared to an analytical model based on the theory of viscothermal wave propagation in prismatic tubes. Different tube materials and geometries were examined regarding the influence on their performance. The outcomes of this study led to a sound absorber based on 19 different straw lengths that absorbs well in the frequency range from 400Hz till 1000Hz. The importance of these absorbers can be high when it comes to selective frequency performance that needs to be cost- effective, sustainable and aesthetically pleasing.
机译：由满足特定频率的高性能的最常见的吸收原理开发的产品系列通常仅限于多孔材料。四分之一波长管原理可以表现良好，即使在低频中，也可以在窄频率范围内表现良好。为了扩大范围，可以通过选择长度和直径的组合来调谐到多个频率的多个管。如果设计得当，因此需要更少的材料，因此可以轻松重复使用较低的价格和管。基于通过设计方法的研究，已经开发了一种使用吸管的更多宽带吸声器。在阻抗管中进行正常入射声吸收系数的测量，并与基于棱镜管中粘度升热波传播理论的分析模型进行比较。针对对其性能的影响，检查了不同的管材和几何形状。本研究的结果导致吸音器基于19种不同的秸秆长度，在频率范围内吸收到400Hz至1000Hz的频率范围内。当涉及需要具有成本效益，可持续和美学上令人愉悦的选择性频率性能时，这些吸收剂的重要性可以很高。

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