Innovative Approaches to Sound Absorption in Agricultural Waste-Based Composites: The Role of Perforation Geometry

Ilham Bakri; Fatimah Sahra Musafir; Kifayah Amar; Asniawaty Kusno; Rizki Nur Fadhilah

doi:10.48084/etasr.14540

Authors

Ilham Bakri Department of Industrial Engineering, Hasanuddin University, Makassar, Indonesia | Health and Safety Engineering Research Group, Hasanuddin University, Makassar, Indonesia https://orcid.org/0000-0002-2873-663X
Fatimah Sahra Musafir Department of Industrial Engineering, Hasanuddin University, Makassar, Indonesia
Kifayah Amar Department of Industrial Engineering, Hasanuddin University, Makassar, Indonesia https://orcid.org/0000-0002-8000-9712
Asniawaty Kusno Department of Architecture, Hasanuddin University, Makassar, Indonesia https://orcid.org/0000-0002-9289-1108
Rizki Nur Fadhilah Department of Architecture, Hasanuddin University, Makassar, Indonesia

Volume: 15 | Issue: 6 | Pages: 30624-30632 | December 2025 | https://doi.org/10.48084/etasr.14540

Received: 4 September 2025 | Revised: 30 September 2025 | Accepted: 10 October 2025 | Online: 8 December 2025

Corresponding author: Ilham Bakri

Abstract

This study explores the potential of agricultural waste-based composites, specifically sugarcane bagasse, as sustainable sound-absorbing materials. The research investigates the impact of partial perforations on the Sound Absorption Coefficient (SAC) of bagasse-based panels, with perforation diameters of 1, 2, and 3 mm and depths of 25%, 50%, 75%. Acoustic performance was evaluated using an impedance tube across the frequency range of 200–1600 Hz. The results reveal that panels with 1 mm diameter perforations and 75% depth exhibited the highest SAC, reaching up 0.98 at 1500–1600 Hz. These findings underscore the potential of perforation geometry as a key factor in enhancing the acoustic efficiency of bio-composite materials. This study highlights the viability of optimizing perforation designs to develop sustainable, high-performance sound absorbers, offering an eco-friendly alternative to conventional acoustic materials. The outcomes contribute to advancing circular economy practices by utilizing agricultural waste for noise mitigation in urban environments.

Keywords:

sustainable composites, sound absorption, agricultural waste, sound absorption coefficient, perforated bio-composites

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