Evaluation of Sound Absorption Capability from PET Mesh to PET/PU Composite Board

Yu Cheng Liu; Jin Huang Huang; Chen Hung Huang; Min Hon Tsai; Yu Chun Chuang

doi:10.4028/www.scientific.net/AMR.936.1994

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 936Evaluation of Sound Absorption Capability from PET...

Evaluation of Sound Absorption Capability from PET Mesh to PET/PU Composite Board

Abstract:

This article completely investigates from nonwoven to PET/PU composite board on the variations of absorption coefficient by using standard impedance tube with four microphones. Recently, PET/PU composite board is becoming a popular and functional material because of the high flexibility in the abilities, such as thermal protection, chemical-proof, acoustic-resistance and etc.. Thus, it is important to realize the variations of absorption capability from single material to complete composite material, and can feedback some suggestions to the designer. Results shows that nonwoven only has a stable increase in absorption coefficient with the frequencies because of the inherent porous characteristics. With the substantial properties, foam has lower absorption coefficient and two peaks occurring in the higher frequencies. These both peaks are caused by the resonance between wave and foam at specified frequency. With an additional nonwoven in the rear side of composite foam, absorption coefficient of PET/PU composite board will effectively increase. Based on the diverse applications, absorption coefficient of PET/PU composite board can be flexible modulated to consistent with the requirements.

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Periodical:

Advanced Materials Research (Volume 936)

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1994-1998

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.936.1994

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Online since:

June 2014

Authors:

Yu Cheng Liu*, Jin Huang Huang, Chen Hung Huang, Min Hon Tsai, Yu Chun Chuang

Keywords:

Absorption Coefficient, Foam, Impedance Tube, Nonwoven, PU Composite Board

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