Fabrication of Eco-friendly Micro-Perforated Panel Through Additive Manufacturing
Résumé
Today, 3D printing technology is a smart technique for Manufacturing acoustic absorbers with enhanced mechanical and acoustical properties and lower carbon footprint. The present study deals with the acoustic performance of biodegradable Micro-Perforated Absorbers (MPPA) made of natural fiber-reinforced composites (NFRC) by 3D printing. The test specimens are made of PLA/Corkwood Composite using the Fused Deposition Modeling (FDM) method. Furthermore, considering the cost and sound absorption coefficient, samples were optimized using the RSM-CCD method. The results showed that the average sound absorption coefficient in NFRC-MPP is 25% higher than conventional MPP. Also, adding a hemp layer behind the MPP significantly improves the sound absorption performance in the desired frequency range.
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