Improving Sound Absorption Property of Polyurethane Foams by Adding Tea-Leaf Fibers

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.