Effect of Natural Fiber and Filler on the Acoustic Isolation of Composite Materials.. A Review.

In recent years, the properties of natural fibers and their effectiveness in sound absorption have been widely studied in an attempt to replace traditional sound-absorbing synthetic materials. This is because traditional synthetic fibers carry health risks for humans and have a significant environmental impact. This study includes a summary of previous studies highlighting existing and newly invented natural fiber sound absorbers in three categories: raw materials, plant fibers, and plant residues, which study the mechanism of sound absorption, in addition to several prediction models and widely used acoustic characterization methods. These studies include a comparison of the sound absorption of several natural sound absorbers and fiberglass in two groups of thin and thick materials. These studies have proven that many natural materials have high efficiency in absorbing sound, such as pineapple leaf fibers, which are ideal alternatives to fiberglass. Finally, the concluding section of this analysis provides a future outlook on enhancing the commercial use of plant waste through theoretical research and practical experiments to renew their effectiveness in this field. [ABSTRACT FROM AUTHOR]