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This paper investigates the use of expanded cork agglomerates and natural moss to mitigate unwanted traffic noise in urban environments. It examines the acoustic properties of these naturally porous biomaterials and explores the feasibility of utilizing CNC milling technology to fabricate design panels that maximize sound absorption. The investigation is grounded in the physical parameters of cork and moss, assessing their experimental performance via impedance tube testing according to ISO 10534-2 standards [1]. The data reveals a direct correlation between different geometric configurations and variations in absorption performance, particularly with the presence or absence of live moss. Promising results indicate the efficacy of expanded cork in enhancing spatial sound quality with peak sound absorption coefficient reaching 0.99. Nevertheless, further research is warranted to explore additional fabrication potentials. This study offers insights into designing and fabricating sound-absorbing panels using natural materials, underscoring the potential of cork and moss as environmentally friendly alternatives to synthetic materials. These findings contribute to the discourse on sustainable and innovative noise reduction solutions in urban settings.

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From Nature to Noise Reduction: A Study of CNC Milling Fabrication with Cork and Moss-Based Materials

  • 会议论文

  • 发表日期：

    2025年

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  • Xinrui Cai,
  • Sahda Salsabila,
  • Tin Oberman,
  • Marcos Cruz,
  • Brenda Parker,
  • Vijay Pawer

摘要

This paper investigates the use of expanded cork agglomerates and natural moss to mitigate unwanted traffic noise in urban environments. It examines the acoustic properties of these naturally porous biomaterials and explores the feasibility of utilizing CNC milling technology to fabricate design panels that maximize sound absorption. The investigation is grounded in the physical parameters of cork and moss, assessing their experimental performance via impedance tube testing according to ISO 10534-2 standards [1]. The data reveals a direct correlation between different geometric configurations and variations in absorption performance, particularly with the presence or absence of live moss. Promising results indicate the efficacy of expanded cork in enhancing spatial sound quality with peak sound absorption coefficient reaching 0.99. Nevertheless, further research is warranted to explore additional fabrication potentials. This study offers insights into designing and fabricating sound-absorbing panels using natural materials, underscoring the potential of cork and moss as environmentally friendly alternatives to synthetic materials. These findings contribute to the discourse on sustainable and innovative noise reduction solutions in urban settings.