Sound Absorption of Hemp Fibers (Cannabis Sativa L.) Based Nonwoven Fabrics and Composites: A Review

Compared to the commonly used synthetic fibrous materials, natural fiber represents an eco-friendly solution in various engineering fields. Noise control is an important application of natural fibers due to the unique acoustic characteristics. Studies on the sound absorption of hemp fibers have attracted more and more attention in recent years. Generally, hemp products for sound absorption mainly including nonwoven fabrics and fiber-reinforced composites. This review has gathered the most recent advances on the acoustics of hemp fibers, and also the sound absorption design principles of hemp-based materials. A detailed information related to the improvement of the sound absorption properties of hemp is given, which mainly including the optimization of manufacturing, materials component, bulk density, morphologies, and structural parameters, etc. Hemp fibers exhibit robust acoustical performance, and the present work is beneficial to the development of sound absorption hemp-based materials.

Automated summary

Compared to synthetic fibrous materials, natural fiber offers an eco-friendly solution in engineering fields due to its unique acoustic characteristics. Recent studies have shown increasing interest in the sound absorption properties of hemp fibers. This review presents the latest advancements in the acoustics of hemp fibers and the design principles for sound absorption hemp-based materials. The improvement of sound absorption properties of hemp includes optimizing manufacturing, materials component, bulk density, morphologies, and structural parameters. Hemp fibers demonstrate robust acoustic performance, contributing to the development of sound absorption hemp-based materials.