Corn Husk Fiber-Polyester Composites as Sound Absorber: Nonacoustical and Acoustical Properties

Q2 Physics and Astronomy

Advances in Acoustics and Vibration Pub Date : 2017-01-01 DOI:10.1155/2017/4319389

N. H. Sari, I. Wardana, Y. Irawan, E. Siswanto

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引用次数: 38

Abstract

This study investigates the acoustical and nonacoustical properties of composites using corn husk fiber (CHF) and unsaturated polyester as the sound-absorbing materials. The influence of the volume fraction of CHF on acoustic performance was experimentally investigated. In addition, the nonacoustical properties, such as air-flow resistivity, porosity, and mechanical properties of composites have been analyzed. The results show that the sound absorptions at low frequencies are determined by the number of lumens in fiber, particularly the absorption coefficient, which increases the amount of fiber. For high-frequency sound, the absorption coefficient is determined by the arrangement of fibers in the composite. An absorption coefficient is close to zero when the fibers are arranged in a conventional pattern; however, when they are arranged in a random pattern, a high absorption coefficient can be obtained. The bond interface between the fiber and resin enhances its mechanical properties, which increases the longevity of the composite panel.

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玉米壳纤维-聚酯复合材料吸声性能:非声性能和声性能

研究了以玉米壳纤维和不饱和聚酯为吸声材料的复合材料的声学和非声学性能。实验研究了CHF体积分数对声学性能的影响。此外，还分析了复合材料的非声学性能，如气流电阻率、孔隙率和力学性能。结果表明，光纤在低频处的吸声性能与光纤的流明数有关，特别是与光纤的吸声系数有关。对于高频声，吸收系数由复合材料中纤维的排列决定。当纤维以常规模式排列时，吸收系数接近于零;然而，当它们以随机模式排列时，可以获得较高的吸收系数。纤维与树脂之间的结合界面增强了其机械性能，从而增加了复合板的使用寿命。

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Advances in Acoustics and Vibration ACOUSTICS-

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期刊介绍： The aim of Advances in Acoustics and Vibration is to act as a platform for dissemination of innovative and original research and development work in the area of acoustics and vibration. The target audience of the journal comprises both researchers and practitioners. Articles with innovative works of theoretical and/or experimental nature with research and/or application focus can be considered for publication in the journal. Articles submitted for publication in Advances in Acoustics and Vibration must neither have been published previously nor be under consideration elsewhere. Subject areas include (but are not limited to): Active, semi-active, passive and combined active-passive noise and vibration control Acoustic signal processing Aero-acoustics and aviation noise Architectural acoustics Audio acoustics, mechanisms of human hearing, musical acoustics Community and environmental acoustics and vibration Computational acoustics, numerical techniques Condition monitoring, health diagnostics, vibration testing, non-destructive testing Human response to sound and vibration, Occupational noise exposure and control Industrial, machinery, transportation noise and vibration Low, mid, and high frequency noise and vibration Materials for noise and vibration control Measurement and actuation techniques, sensors, actuators Modal analysis, statistical energy analysis, wavelet analysis, inverse methods Non-linear acoustics and vibration Sound and vibration sources, source localisation, sound propagation Underwater and ship acoustics Vibro-acoustics and shock.