Effect of density and surface finishing on sound absorption of oil palm frond

  • Nanthicha Bubparenu Department of Environmental Health Sciences, Faculty of Public Health, Mahidol University, Bangkok, Thailand
  • Nikhom Laemsak Department of Environmental Health Sciences, Faculty of Public Health, Mahidol University, Bangkok, Thailand & Department of Forest Products, Faculty of Forestry, Kasetsart University, Bangkok, Thailand
  • Ratchapak Chitaree Department of Physics, Faculty of Science, Mahidol University, Bangkok, Thailand
  • Tanasri Sihabut Department of Environmental Health Sciences, Faculty of Public Health, Mahidol University, Bangkok, Thailand & Center of Excellence on Environmental Health and Toxicology (EHT), Bangkok, Thailand
Keywords: Oil palm frond, Sound absorption, Natural fibers, Noise, Fiberboard

Abstract

In this study, worthless discarded oil palm fronds were used to produce environmentally-friendly sound absorbing material to replace harmful man-made inorganic fibers.  To quantify the properties of sound absorption, oil palm frond fiberboards in various densities, i.e., 0.17, 0.21, 0.26 and 0.30 g cm-3, were produced by traditional soft board production and tested for their sound absorption coefficients at 250, 500, 1000 and 4000 Hertz using a standing wave apparatus assembled following ASTM C-384. The boards with the best sound absorption capacity were selected to cover their surfaces using the nonperforated and 5% perforated wood veneers, and the effects of surface finishing on their sound absorption capacity were rechecked. Results showed that the lower density fiberboards showed better sound absorption at high frequencies. Among these, 0.17 g cm-3 fiberboards displayed the highest sound absorption capacity. Once these boards were finished with the nonperforated wood veneers, the sound absorption coefficients at high frequencies sharply decreased. However, when perforating the veneer sheets, the coefficients of fiberboards increased and were comparable to the ones without any finishing. Therefore, the optimum density of fiberboard and opening surface can enhance the sound absorption capacity of fibers.

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References

(1) Drent M, Bomans HP, Van Suylen JR, Lamers JR and Basta Wouters FE. Association of man-made mineral fibre exposure and sarcoidlike granulomas. Respir Med. 2000; 94: 815-20.

(2) WHO. IARC Monographs on the evaluation of carcinogenic risks to humans. MMVF. 1988(81).

(3) WHO. IARC Monographs on the evaluation of carcinogenic risks to humans. MMVF. 2002(81).

(4) Oldham DJ, Egan CA and Seiffert G. Sustainable acoustic absorbers from biomass. Appl Acoust. 2011; 72: 350-63.

(5) Asdrubali F, Schiavoni S, and Horoshenkov KV. A review of sustainable materials for acoustic application. Build Acoust. 2012; 19(4): 283-311.

(6) Sihabut T, Laemsak N. Soud absorption capacity of oil palm frond fiberboard with different finishing. Environment and Natural Resources J. 2010; 8:48-55.

(7) Sihabut T, Laemsak N. Feasibility of producing insulation boards from oil palm fronds and empty fruit bunches. Songklanakarin J Sci Technol. 2010; 32: 63-9.

(8) Sihabut T, Laemsak N. Production of oil palm frond fiberboard and its sound absorption characteristics. Kasetsart J (Nat Sci). 2012; 46: 120-6.

(9) Suchsland O, Woodson GE. Fiberboard manufacturing practices in the United States. Wasgington DC: U.S. Government printing office; 1986.

(10) Zulkifli R, Nor MJM, Ismail AR, Nuawi MZ, Abdulla S, Thahir MFM. Comparison of acoustic properties between coir fiber and oil palm fiber. Eur J Sci Res. 2009; 33: 144-52.

(11) Ismail LI, Ghaali MI, Mahzan S, Zaidi MA. Sound absorption of Arenga Pinnata Natural Fiber. Int J Chem. 2010; 4:438-40.

(12) Koiumi T, Tsujiuchi N, Adachi A. The development of sound absorbing materials using natural bamboo fibers. In: CA Brebbia, WP de Wilde, editors. High performance structures and composites: The environment. Southampton: WIT Press; 2002. p.157-66.

(13) Karlinasari L, Hermawan D, Maddu A, Martianto B, Lucky IK, Nugroho N, Hadi YS. Acoustical properties of pparticleboards made from bamboo (Dendrocalamus Asper) as building construction material. BioResources. 2012; 7:5700-09.

(14) Borelli D, Schenone C, Pittaluga I. Analysis of sound absorption behavior of polyester fibre material faced with perforated panels. J Acoust Soc Am. 2013; 19: 2-9.

(15) Netmali W. Production conditions and sound absorption capacity of fiberboards made from oil palm empty fruit bunch fibers [MSc thesis]. Bangkok: Mahidol University;2012.

Published
2018-08-31
Section
Research Articles