N2 - The sound absorption property of polyurethane (PU) foams loaded with natural tea-leaf fibers and luffa cylindrica (LC) has been studied. The results show a significant improvement in the sound absorption property parallel to an increase in the amount of tea-leaf fibers (TLF). Using luffa-cylindrica as a filler material improves sound absorption properties of soft foam at all frequency ranges. Moreover, an increase in the thickness of the sample resulted in an improvement of the sound absorption property. It is pleasing to see that adding tea-leaf fibers and luffa-cylindrica to the polyurethane foam demonstrate a significant contribution to sound absorption properties of the material and it encourages using environmental friendly products as sound absorption material in further studies. L1 - http://www.czasopisma.pan.pl/Content/101625/PDF/12_paper.pdf L2 - http://www.czasopisma.pan.pl/Content/101625 PY - 2012 IS - No 4 EP - 520 DO - 10.2478/v10168-012-0052-1 KW - fibers KW - polymer-matrix composites KW - sound absorption KW - tea-leaf KW - luffa-cylindrica A1 - Ekici, Bülent A1 - Kentli, Aykut A1 - Küçük, Haluk PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 37 DA - 2012 T1 - Improving Sound Absorption Property of Polyurethane Foams by Adding Tea-Leaf Fibers SP - 515 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/101625 T2 - Archives of Acoustics