Experimental and mathematical survey of sound absorption performance of date palm fibers.

摘要: Abstract The present study examines the acoustic behavior sample composites made of date palm natural fibers and polyvinyl alcohol. It also provides comparison between sound absorption coefficients obtained from experimental tests ones predicted by mathematical models. An impedance tube system was used to measure normal coefficient samples. Using differential equation algorithm, for Johnson-Champoux-Allard model calculated. properties samples increased significantly increasing frequency, thickness materials with constant density. Comparison data showed that will make tested values comparable. Date have a good potential dissipating energy waves particularly when an air gap is introduced behind can be as new source fabrication fiber reinforced composites.