Sustainable sound absorption using shredded plastic particles : adjusting low-frequency acoustic performance with particle size

Železnik, Anže (avtor), Čurović, Luka (avtor), Prezelj, Jurij (avtor)

This study investigates the sound absorption properties of shredded recycled plastic particles, with a focus on how particle size influences low-frequency acoustic performance. Given the growing environmental challenge posed by plastic waste, this research aims to repurpose such materials into effective, sustainable sound absorbers, contributing to both noise reduction and waste minimization efforts. The sound absorption coefficients and normalized surface impedances of different size fractions, ranging from 45 μm to 3 mm, were measured using the standard two-microphone impedance tube method in accordance with ISO 10534-2. The analysis revealed that smaller particle sizes significantly enhance low- frequency absorption, though at the expense of the maximum absorption coefficient across a broader frequency range. This trade-off underscores the importance of particle size in designing materials tailored to specific acoustic applications. Results indicate that optimal sound absorption shifts towards higher frequencies for larger particle sizes, while finer particles are more effective at lower frequencies. The ability to customize the acoustic properties of shredded plastic particles by selecting appropriate particle sizes is a key outcome of this study. Microscopic examination of the particles revealed a correlation between particle morphology and acoustic performance, with irregular shapes contributing to enhanced sound energy dissipation. The findings suggest that shredded recycled plastic particles are a viable and sustainable option for creating customizable sound-absorbing materials, particularly in applications where low-frequency noise re- duction is critical. This research not only advances the understanding of acoustic performance in recycled materials but also supports broader sustainability goals by offering an innovative use for plastic waste in industrial and architectural noise control solutions. In conclusion, this study provides a foundation for the development of eco-friendly, effective sound- absorbing materials from recycled plastics, emphasizing the importance of particle size in achieving desired acoustic properties.

• Jezik: Angleški jezik
• Ključne besede: absorption coefficient, impedance tube, recycled materials, shredded plastic, low-frequency sound absorption
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Datum objave: 01.01.2025
• Leto izida: 2025
• Št. strani: 12 str.
• Številčenje: Vol. 44, issue 2
• PID: 20.500.12556/RUL-167026
• UDK: 534.83
• ISSN pri članku: 2048-4046
• DOI: 10.1177/14613484251314934
• COBISS.SI-ID: 224899843
• Datum objave v RUL: 04.02.2025

Gradivo je del revije

• Naslov: Journal of low frequency noise, vibration, and active control
• Skrajšan naslov: J. low freq. noise vib. act. control
• Založnik: Sage Publications
• ISSN: 2048-4046
• COBISS.SI-ID: 526419993

Licence

• Licenca: CC BY-NC 4.0, Creative Commons Priznanje avtorstva-Nekomercialno 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc/4.0/deed.sl
• Opis: Licenca Creative Commons, ki prepoveduje komercialno uporabo, vendar uporabniki ne rabijo upravljati materialnih avtorskih pravic na izpeljanih delih z enako licenco.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: koeficient absorpcije, impedančna cev, reciklirani materiali, mleta plastika, nizkofrekvenčna absorpcija zvoka

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0401
• Naslov: Energetsko strojništvo