Assessment of sound absorbing properties of polyurethane sandwich system
Tomasz Małysa, Krzysztof Nowacki, Jakub Wieczorek
Quarterly No. 4, 2016 pages 244-248
DOI:
keywords: polyurethane materials, sound absorption coefficient, polyurethane sandwich system.
abstract The article presents the results of the properties of sound absorbing layer systems produced from recycled polyurethane foams. The sound absorption coefficient values were determined on the basis of the standing waves method in the frequency range from 1000 to 6300 Hz. The average sound absorption coefficient values for the systems produced from the polyurethane foams were αf = 0.82 (system formed from a foam of an apparent density of 220 kg/m3), αf = 0.59 (system formed from a foam of an apparent density of 240 kg/m3). A comparative of the sound absorption coefficient values of produced chips layered in comparison to single layer foam was also presented. The highest average sound absorption coefficient value was obtained forthe layer system formed from a foam of an apparent density 220 kg/m3. The conducted study of the properties of sound absorbing polyurethane foam allowed selection of a technical solution that can be used to reduce noise in the work environment, and also to expand the possibilities of practical application of polyurethane foams from PU recyclates.