纤维截面形状对聚酯纤维材料吸声性能的影响研究

为探讨聚酯纤维截面形状对吸声性能的影响，通过热压法制备了4种不同纤维截面形状的聚酯纤维板，利用阻抗管对4种聚酯纤维板在80~6 300 Hz频率范围内的吸声性能进行测试。根据流阻率模型和声阻抗模型对材料吸声性能进行预测，并将该模型的计算结果与测试结果进行比较。结果表明：扁平截面的聚酯纤维材料的吸声性能最佳，平均吸声系数达到0.404；对于聚酯纤维材料的吸声系数与模型的计算值，圆形截面聚酯纤维材料吻合较好（全频段误差率为2.036%），异形截面聚酯纤维材料的误差较大。

Research on the influence of polyester fiber cross-section shape on sound absorption performance of polyester fiber materials

To investigate the influence of the cross-section shape of polyester fiber on the sound absorption performance, four kinds of polyester fiber panels with different cross-section shapes are prepared by hot pressing method. The impedance tube is used to measure the sound absorption coefficient in the frequency range of 80~6 300 Hz. The sound absorption property of the material is predicted according to the flow-resistance model and the acoustic impedance model. The model calculation results are compared with measurement results. The results show that the polyester fiber material with flat cross-section has the best sound absorption property and the average sound absorption coefficient reaches 0.404; the measured sound absorption coefficient of the polyester fiber material with circular cross-section is in good agreement with the model calculation result, the error rate is 2.036% in the whole frequency range, but for the polyester fiber material with other cross-section shapes, the error is large.