Sustainable Local Materials of Natural Fibre-based Composite for Optimizing Acoustic Performance in Aerospace Applications

The rising demand for sustainable and lightweight materials for noise-control applications has motivatedresearchers to search for environment-friendly alternatives to traditional synthetic acoustic materials. Localmaterials of natural fiber-reinforced composites (NFRC) are the natural reinforcements for composites that arebeing used, which have great applications for sound absorption in aerospace (one of the basic services), pavingthe pathway to development assistance and sustainable industrialization by using this in civil engineering andautomotive applications. They act as eco-friendly, sustainable composites with economical viable alternative inplace of synthetic composites. This research on NFRC analyzes the production and acoustic characteristics ofnatural resources like sisal, banana and bamboo fibers composites and aims to improve global resourceefficiency. The sound absorption coefficient (SAC) was measured on composite samples with a thickness of 20mm and 40 mm using the impedance tube method in the frequency range of 200 Hz to 1600 Hz. Research showsthat sisal fibre composites have a significant sound absorption coefficient, which is up to 0.91 at 1280 Hz.According to ANOVA, the material type (sisal, banana, bamboo) significantly influences SAC. Thickness alsohas some impact, but it is not as strong as the material. Furthermore, the study also examines the optimization ofacoustic qualities. The results revealed that the composite has appreciable acoustic performance, and itsstrength-to-weight ratio can support improving energy efficiency