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Experimental Survey of the Sound Absorption Performance of Natural Fibres in Comparison with Conventional Insulating Materials

Author

Listed:
  • Veronika Gumanová

    (Department of Environmental Engineering, Faculty of Mechanical Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia)

  • Lýdia Sobotová

    (Department of Environmental Engineering, Faculty of Mechanical Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia)

  • Tibor Dzuro

    (Department of Environmental Engineering, Faculty of Mechanical Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia)

  • Miroslav Badida

    (Department of Environmental Engineering, Faculty of Mechanical Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia)

  • Marek Moravec

    (Department of Environmental Engineering, Faculty of Mechanical Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia)

Abstract

The purpose of this research is to investigate the acoustic properties of natural fibres and compare them with the values achieved by common insulation materials used in the construction of buildings. Three materials based on biomass were used for testing, namely cork, hemp and fibreboard. From the group of conventional materials, mineral wool, propylat and polyurethane foam were selected. For the purpose of determining the values of the sound absorption coefficient (α), the absorber specimens were tested using the impedance tube and two microphones method, according to standard ISO 10534-2. The measurement was performed for thicknesses of 20, 40, 60, 80 and 100 mm. The highest sound absorption of all materials was measured with a hemp sample at a frequency of 2000 Hz (α = 0.99) and a thickness of 20 mm. The lowest performance was achieved by cork at the same thickness and frequency of 100 Hz (α = 0.02). Among biomass materials, hemp dominated in the entire frequency range and at all thicknesses. The lowest values were for cork, from 160 to 500 Hz with a tendency to exceed the values of the fibreboard sample. Among conventional materials, mineral wool achieved the best results, while the lowest values were recorded for propylat with the occasional exception of the highest frequencies from 1600 to 2500 Hz.

Suggested Citation

  • Veronika Gumanová & Lýdia Sobotová & Tibor Dzuro & Miroslav Badida & Marek Moravec, 2022. "Experimental Survey of the Sound Absorption Performance of Natural Fibres in Comparison with Conventional Insulating Materials," Sustainability, MDPI, vol. 14(7), pages 1-16, April.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:7:p:4258-:d:786447
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    References listed on IDEAS

    as
    1. Marek Moravec & Miroslav Badida & Nikoleta Mikušová & Lýdia Sobotová & Jozef Švajlenka & Tibor Dzuro, 2021. "Proposed Options for Noise Reduction from a Wastewater Treatment Plant: Case Study," Sustainability, MDPI, vol. 13(4), pages 1-22, February.
    2. Tao Yang & Lizhu Hu & Xiaoman Xiong & Michal Petrů & Muhammad Tayyab Noman & Rajesh Mishra & Jiří Militký, 2020. "Sound Absorption Properties of Natural Fibers: A Review," Sustainability, MDPI, vol. 12(20), pages 1-25, October.
    3. Jozef Švajlenka & Mária Kozlovská & Miroslav Badida & Marek Moravec & Tibor Dzuro & František Vranay, 2020. "Analysis of the Characteristics of External Walls of Wooden Prefab Cross Laminated Timber," Energies, MDPI, vol. 13(22), pages 1-14, November.
    4. Moretti, Elisa & Belloni, Elisa & Agosti, Fabrizio, 2016. "Innovative mineral fiber insulation panels for buildings: Thermal and acoustic characterization," Applied Energy, Elsevier, vol. 169(C), pages 421-432.
    5. Jorge P. Arenas & Kimihiro Sakagami, 2020. "Sustainable Acoustic Materials," Sustainability, MDPI, vol. 12(16), pages 1-5, August.
    6. Ricciardi, P. & Belloni, E. & Cotana, F., 2014. "Innovative panels with recycled materials: Thermal and acoustic performance and Life Cycle Assessment," Applied Energy, Elsevier, vol. 134(C), pages 150-162.
    7. Juan Miguel Barrigón Morillas & David Montes González & Rosendo Vílchez-Gómez & Valentín Gómez Escobar & Rubén Maderuelo-Sanz & Guillermo Rey Gozalo & Pedro Atanasio Moraga, 2021. "Virgin Natural Cork Characterization as a Sustainable Material for Use in Acoustic Solutions," Sustainability, MDPI, vol. 13(9), pages 1-14, April.
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    1. Miroslav Badida & Marek Moravec & Miriama Pinosova & Miriam Andrejiova & Kristián Pástor & Alžbeta Nováková & Tibor Dzuro, 2022. "Analysis and Research on the Use of Bulk Recycled Materials for Sound Insulation Applications," Sustainability, MDPI, vol. 14(18), pages 1-17, September.

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