Preferences help
enabled [disable] Abstract
Number of results
2018 | 20 | 129-147
Article title

The Potential of Selected Agricultural Wastes Fibers as Acoustic Absorber and Thermal Insulator Based on their Surface Morphology via Scanning Electron Microscopy

Title variants
Languages of publication
Natural fibrous materials have been studied to address noise and high heat indices, but many of the existing studies about natural fibers do not sufficiently support their claims of better acoustical and heat insulating materials. Thus, this study investigated the surface morphology of easily available agricultural materials such as coconut husks, banana pseudostem and sugarcane husk for their potential as sound absorbers and thermal insulators. Fiber pads from the materials were constructed and analyzed for noise reduction coefficients, thermal insulating performance, water absorbing capacity and flame tolerance - using the methods specified in the American Society for Testing Materials. Herein, scanning electron microscopy (SEM) was applied for analytical imaging of the agricultural materials. Noise reduction coefficients (0.80 dB and 0.92 dB), (0.75d B and 0.78 dB) and (0.50 dB and 0.35 dB) each at 800 Hz and 440 Hz, and heat reductions of 2.56 °C, 1.71 °C, and 1.24 °C were obtained from coconut husk, sugarcane husk and banana pseudostem, respectively. The coconut husk also gave the highest water absorbing capacity and high flame tolerance of 56%, compared to that of sugarcane husk (49%) and banana pseudostem (32.67%). The morphology of the coconut husk, after SEM application revealed more diverse microporous cells with varying shapes and sizes compared to that of sugarcane husk and banana pseudostem. Thus, results indicate that porosity affects the noise and heat reduction indices of the fibers. The more porous the material is, the better its potential as sound absorber and thermal insulator.
Physical description
  • Senior High School Department, Nabuslot National High School, Pinamalayan, Oriental Mindoro, Philippines
  • Senior High School Department, MIMAROPA Regional Science High School, Bansud, Oriental Mindoro, Philippines
  • Senior High School Department, Nabuslot National High School, Pinamalayan, Oriental Mindoro, Philippines
  • [1] Abad, Manuel et al. Physico-chemical and Chemical Properties of some Coconut Coir Dusts for Use as a Peat substitute for Containerized Ornamental Plants. Bioresource Technology, 82(3) (2002) 241-245.
  • [2] Arenas, Jorge P., & Crocker, Malcolm J. Recent Trends in Porous Sound-Absorbing Materials. Sound & Vibration, 44 (2010) 12-17.
  • [3] Ayub, Md. et al. Analysis on sound absorption of natural coir fiber using delany-bazley model. Proceedings of the International Conference on Mechanical Engineering (2009) 26-28.
  • [4] Cheung, Chun K., Fuller, Robert J., & Luther, Mark B. Energy-efficient Envelope Design for High-Rise Apartments, Energy and Buildings, 37(1) 2005 37-48.
  • [5] Ersoy & Kucuk. Investigation of industrial tea-leaf-fiber waste material for its sound Absorption properties. Applied Acoustic, 70 (2009) 215-220.
  • [6] Fouladi, Mohammad Hosseini et al. Utilization of coir fiber in multilayer acoustic absorption panel. Applied Acoustics, 71 (2010) 241-249.
  • [7] Ganiron, Tomas U. Jr. Investigation on the use of Coco Coir Polypropylene as Thermal Insulator. International Journal of Advanced Sciences and Technology,59 (2013) 13-26.
  • [8] Gupta, Srimata & Ghatak, Chitralekha. Environmental noise assessment and its effect on human health in an urban area. Int. J. Environ Sci 1 (2011) 1954-1964.
  • [9] Hosseini, et al. Utilization of coir fiber in multilayer acoustic absorption panel. Applied Acoustics, 71 (2010) 241-249.
  • [10] Khedari, Joseph, Charoenvai, Sarocha, & Hirunlabh, J. New insulating particleboards from durian peel and coconut coir. Building and Environment, 38 (2003) 435-441.
  • [11] Khedari, Joseph et al. New low-cost insulation particleboards from mixture of durian peel and coconut coir. Building and Environment, 39 (2004) 59-65.
  • [12] Koizumi, Tsujiuchi & Adachi. The development of sound absorbing materials using natural bamboo fibers. WIT Transactions on the Built Environment, 59 (2002).
  • [13] Lee & Chen. Acoustic transmission analysis of multilayer absorbers. Journal of Sound and Vibration, 248 (4) (2001) 621-634.
  • [14] Liu, Karen & Baskaran, Bas. Thermal Performance of Green Roofs through Field Evaluation, Proceedings for the First North American Green Roof Infrastructure Conference, Awards and Trade Show, 2003.
  • [15] Mahzan Study on sound absorption properties of coconut coir fibre reinforced composite with added recycled rubber. International Journal of Integrated Engineering (2010) 29-34.
  • [16] Manlapas, Grace O., & Banaldia. Jenith L. Drinking Straw and Coco Coir Fiber as Thermal Insulator: A Technology Innovation. Imperial Journal of Interdisciplinary Research 2(11) (2016) 1296-1301.
  • [17] Rouquerol et al. Recommendations for the Characterization of Porous Solids. International Pure and Applied Chemistry, 66(8) (1994) 739-1754.
  • [18] Suter, Alice H. Construction noise: Exposure, effectsand the potential for remediation; A review and analysis. AIHA Journal, 63 (2002) 768-789.
  • [19] Wang, Chao-Nan & Torng, Jiunn-Hwan. Experimental study of the absorption characteristic of some porous fibrous materials. Applied Acoustics, 62 (4) (2001) 447-459.
  • [20] Wilson, D.K. Simple, Relaxational Models for the Acoustical Properties of Porous Media. Applied Acoustics, 50 (3) (2014) 171-188.
  • [21] Yang, Han-Seung, Kim, Dae-Jun & Kim, Hyun-Joong. Rice straw wood particle composite for sound absorbing wooden construction materials. Bioresource Technology, 86 (2003) 117-121.
  • [22] Zulkifli et al. Noise Control Using Coconut Coir Fiber Sound Absorber with Porous Layer Backing and Perforated Panel. American Journal of Applied Sciences, 7 (2) (2010) 260-264.
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.