Electrospun micro and nanofibers produced via electrospinning method were used for the sound absorption purposes. Polymers were initially dissolved in dimethyleformamide (DMF) or ethanol with a ratio of 80:20 and electrospun at 20 kV, 20 cm separation distance and 3 ml/hrs pump speed. The two-microphone transfer function method of the B&K impedance tube was used to determine the acoustical properties of the manufactured nanofibers at various frequencies. The test results showed that the absorption coefficients of nanofibers (～500 run) drastically increased. The reason behind this phenomenon may be attributed to the higher surface area of nanofibers and their interactions with more sound waves/air molecules. This result may open up new possibilities for the sound absorption problems in many fields, such as aircrafts, other transportation vehicles and infrastructures.
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机译：通过静电纺丝法生产的静电纺微纤维和纳米纤维被用于吸声。首先将聚合物以80:20的比例溶解在二甲基甲酰胺（DMF）或乙醇中，并在20 kV，20 cm的分离距离和3 ml / hrs的泵速下进行电纺。 B＆K阻抗管的双麦克风传递函数方法用于确定所制造的纳米纤维在各种频率下的声学特性。测试结果表明，纳米纤维（〜500nm）的吸收系数急剧增加。这种现象背后的原因可能归因于纳米纤维的较高表面积以及它们与更多声波/空气分子的相互作用。这一结果可能为飞机，其他运输工具和基础设施等许多领域的吸声问题开辟新的可能性。
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