结构因素对多孔材料吸声性能的影响

Effect of structural factors on sound absorption properties of porous materials

多孔吸声材料由于具有比重小、取材范围广、加工制造工艺相对简单等优点而在吸声降噪领域显示出了广阔的应用前景。为了更好的研究与设计多孔吸声材料,总结和分析了多孔材料中孔隙率、孔隙形貌、孔径、厚度和空腔等结构因素对材料吸声性能的影响。发现孔隙率和孔径过大或过小均不利于吸声性能的提高,可能存在一最佳值;而厚度和空腔的增加能有效提升吸声性能,不过存在一上限值。另外,对此类研究进行了展望。

Porous sound-absorbing materials display a broad application prospects in the field of acoustic noise reduction because of their small proportion, large derived range and manufacture of relatively simple. In order to research and design porous sound-absorbing material better, the effect of structural factors such as porosity, pore morphology, aperture, thickness and cavity on the sound absorption properties of porous materials were summarized. The absorption effect will be worse when the porosity is too large or too small. The increase in thickness and cavity can enhance the absorption properties, but the effect had an upper limit. And the future prospects of such studies were also discussed.