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http://dx.doi.org/10.7855/IJHE.2013.15.6.011

Comparison of Sound Transmission Loss Through Single and Double with Vacuum Layer Polymer Soundproof Panel  

Lee, Ju Haeng (과학기술연합대학원대학교)
Kim, Ilho (한국건설기술연구원)
Ahn, Kwang ho (한국건설기술연구원)
Publication Information
International Journal of Highway Engineering / v.15, no.6, 2013 , pp. 11-15 More about this Journal
Abstract
PURPOSES : This study is to compare sound transmission loss(STL) value depending on the four kinds of materials, PC(Polycarbonate), PMMA(Polymethyl mathacrylate), PE(Polyethlyene), PP(Polypropylene), and two types of structure, single layer and double with vacuum layer, of soundproof panel. METHODS : With four sorts of polymer material, the specimens were made as various structures, 4 mm and 8 mm of single soundpoof panel and vacuum layered 4 mm of one. The experimental condition and procedures were complied with authorized process test, KS F 2808. RESULTS : STL of single panel made of PC were the greatest followed by PMMA, PE, PP regardless of the thickness of panel, However, STL of PMMA panel began to decrease around 2500 Hz and reached the lowest value among others in 5000 Hz. Vacuum layer soundproof panel showed good performance in more than 2000 Hz. Only vacuum layer panel made of PC presented resonance frequency at 800 Hz while that of other vacuum ones at 1000 Hz. CONCLUSIONS : According to results of single layer, it was found that single panel functioned as the theorical way we expected in terms of surface density. That trends were blurred as the panel got thicker. And it was suggested also that vacuum layer panel performed well at high frequency, more than 2000 Hz.
Keywords
noise barriers; vacuum layer; sound transmission loss; single layer; polymer; soundproof panel;
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