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首页> 外文期刊>The Journal of the Textile Institute >Establishment of acoustic characteristic model of activated carbon fiber felts
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Establishment of acoustic characteristic model of activated carbon fiber felts

机译：活性炭纤维毛毡声学特征模型的建立

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摘要

In order to analyze two basic characteristic acoustic parameters of activated carbon fiber felts: propagation constant and characteristic impedance, the theoretical model of characteristic impedance concerning the two parameters was established by means of motion and continuity equations based on the propagation theory of acoustic waves in activated carbon fiber materials. On the basis of acoustic theories proposed by Zwikker and Kosten, taking into account of the vibrating influence occurring among fibers and modifying the effective air density and the effective bulk modulus, theoretical model of characteristic acoustic parameters of activated carbon fiber materials was established. Surface acoustic impedance was tested with an impedance tube when activated carbon fiber materials were subjected to an acoustic range of 250-2500 Hz frequencies, then propagation constant and characteristic impedance of activated carbon fiber materials were defined by the method of double thickness. Statistics of two acoustic characteristic parameters in theory and trial were compared and contrasted, which showed that the theoretical model had its feasibility and could provide reference for developing and designing the activated carbon fiber materials with sound absorbing properties.
机译：为了分析活性炭纤维毡的两个基本特征声学参数：传播恒定和特征阻抗，通过基于激活的声波传播理论，通过运动和连续性方程建立了关于两个参数的特征阻抗的理论模型碳纤维材料。在Zwikker和Kosten提出的声学理论的基础上，考虑到纤维中发生的振动影响并改变有效的空气密度和有效的体积模量，建立了活性炭纤维材料的特征声学参数的理论模型。当活性炭纤维材料对250-2500Hz频率的声学范围进行后，用阻抗管测试表面声阻抗，然后通过双厚度的方法定义活性炭纤维材料的繁殖恒定和特征阻抗。比较了理论与试验中的两个声学特征参数的统计，对比，表明理论模型具有其可行性，并可提供具有声音吸收性能的活性炭纤维材料的参考。

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