# Innovative Approaches to Sound Absorption in Agricultural Waste-Based Composites: The Role of Perforation Geometry
> Bakri I.

URL kanonis: https://discover.unhas.ac.id/publications/innovative-approaches-to-sound-absorption-in-agricultural-waste-based-composites
Jurnal / Konferensi: Engineering Technology and Applied Science Research
Tahun terbit: 2025
DOI: https://doi.org/10.48084/etasr.14540
ISSN: 22414487
Kuartil SJR: Q2
Citations: 0

## Authors
- Bakri I.

## 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
- Perforation
- Noise reduction coefficient
- Sound (geography)
- Tube (container)
- Electrical impedance
- Absorption (acoustics)
- Noise (video)
- Materials science
- Acoustics
- Range (aeronautics)
- Acoustic impedance
- Agriculture
- Attenuation coefficient
- Structural engineering
- Engineering
- Noise control
- Key (lock)
- Finite element method

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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