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An acoustic structure design supported by shear thickening fluid for sound absorption
Applied Acoustics ( IF 3.4 ) Pub Date : 2021-07-05 , DOI: 10.1016/j.apacoust.2021.108257
Ramazan Aslan 1 , Osman Turan 1
Affiliation  

In this study, an acoustic structure consisting of cellular and perforated panel absorbers has been designed to noise control. Then, the sound absorption behaviour of designed acoustic structure has been investigated experimentally by reinforcing with STFs having different rheological properties. In addition, the sound absorption performance of the designed acoustic structure has been compared with the Gyroid which is a type of cellular sound absorber. The findings have indicated that the perforated panel activates significantly the sound absorption performance of the designed acoustic structure especially in the low (f<1500Hz) and high (f>3500Hz) frequency ranges. In addition, it has been also observed that this effect becomes stronger with STF reinforcement and significantly improves the sound absorption behaviour of the designed acoustic structure. Besides, it has been noticed that the sound absorption performance of the designed acoustic structure increases with increasing molecular weight of PEG for low frequencies (i.e. f<1500Hz). On the other hand, it has been also observed that the effect of PEG molecular weight on sound absorption behaviour remains relatively limited level for high frequencies (i.e. f>3500Hz). Finally, it has been detected that the effectiveness of STF on the sound absorption performance of designed acoustics structure improves remarkably with increasing silica-nanoparticle ratio in the case of low and high frequencies (i.e. f<1500Hz and f>3500Hz).



中文翻译:

一种由剪切增稠液支撑的吸声结构设计

在这项研究中,设计了一种由蜂窝和穿孔板吸声器组成的声学结构来控制噪声然后,通过用具有不同流变特性的 STF 增强,对设计的声学结构的吸声行为进行了实验研究。此外,所设计的声学结构的吸声性能已与作为一种蜂窝式吸声器的 Gyroid 进行了比较。研究结果表明,穿孔板显着激活了设计的声学结构的吸声性能,尤其是在低(F<1500Hz) 和高 (F>3500Hz) 频率范围。此外,还观察到这种效果随着 STF 增强而变得更强,并显着改善了设计的声学结构的吸声行为。此外,已经注意到,设计的声学结构的吸声性能随着低频 PEG 分子量的增加而增加(即F<1500Hz)。另一方面,也观察到 PEG 分子量对吸声行为的影响在高频下仍然相对有限(即F>3500Hz)。最后,已经检测到STF对设计的声学结构吸声性能的有效性随着低频和高频情况下二氧化硅 - 纳米颗粒比的增加而显着提高(即F<1500HzF>3500Hz)。

更新日期:2021-07-06
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