PRELIMINARY STUDY ON THE SOUND ABSORPTION BEHAVIOR OF SPENT TEA LEAVES FILLED WITH NATURAL RUBBER LATEX BINDER
DOI:
https://doi.org/10.11113/jt.v79.11284Keywords:
Spent tea leaves, sound absorption coefficient, impedance tube, latex binder, natural fiber, acoustic propertiesAbstract
Nowadays, sound control has been regarded as one of the important requirements for human comfort. For an instance, control of room acoustic enables the room to achieve a good auditive environment for effective speech deliverance and presentations. Synthetic fibers such as glass wool fiber are commonly used for sound absorption. Over the years, it was discovered that synthetic fibers are expensive and possess potential hazard to environment and human health. Therefore, growing attention has been turned to natural fibers as an alternative to synthetic fibers. This paper demonstrates the feasibility of spent tea leaf (STL) fiber as an eco-friendly sound absorbing material. STL fiber is a by-product which was extracted from tea plant. It is unique with fresh aroma and rich in phenolic extractive content. Three different grades of STL fiber were studied and the acoustic property was analyzed in terms of sound absorption coefficient (SAC). Results showed that all the samples obtained maximum SAC above 0.70 at frequency range of 1993-3861 Hz. Furthermore, it was found that finest STL fiber grade exhibits better acoustic performance among others with a maximum SAC of 0.88 at 1993 Hz. Besides, the effect of latex binder on the acoustic property of STL fiber was also analyzed. Results suggest that the types of latex binder did not influence the acoustic performance of STL fiber. The overall results indicate that STL fiber can be a promising environment-friendly sound absorbing material.
References
Hung, T. C., Huang J. S., Wang, Y. W. and Lin, K. Y. 2014. Inorganic Polymeric Foam as a Sound Absorbing and Insulating Material. Construction and Building Materials. 50: 328-334.
Jacobsen, F., Torben, P., Holger, R. J., Christian,G. A. and Mogens,O. 2011. Fundamentals of Acoustics. Fundamentals of Acoustics. 1(31200): 560.
Zhang, C., Li, J., Hu, Z., Zhu, F. and Huang, Y. 2012. Correlation Between the Acoustic and Porous Cell Morphology of Polyurethane Foam: Effect of Interconnected Porosity. Materials & Design. 41: 319-325.
Ahsan, Q., Ching, C. P., Yuhazri, M. and Yaakob, B. 2014. Physical and Sound Absorption Properties of Spent Tea Leaf Fiber Filled Polyurethane Foam Composite. Applied Mechanics and Materials. 660(2014): 541-546.
Alessandro F. D. and Pispola, G. 2005. Sound Absorption Properties of Sustainable Fibrous Materials in an Enhanced Reverberation Room. The 2005 Congress and Expostion on Noise Control Engineering. Rio de Janeiro, Brazil. 07-10 August 2005. 1-10.
Claramma, N. M. and Mathew N. M. 1997. Effect of Temperature on Sulfur Prevulcanization of Natural Rubber Latex. Journal of Applied Polymer Science. 65(10): 1913-1920.
Harahap, H. 2006. A Comparative Study on The Effect of Compounded Latex and Diffusion of Curatives on Tensile Properties of Natural Latex Films. Jurnal Teknologi Proses. 5(1): 27-30.
Zulkifli, R., Nor, M. J., Tahir, M. F., Ismail, A. R. and Nuawi, M. Z. 2008. Acoustics Properties of Multi-layer Coir Fibers Sound Absorption Panel. Jourmal of Applied Sciences. 8(20): 3709-3714.
Fatima, S. and Mohanty, A. R. 2011. Acoustical and Fire-Retardant Properties of Jute Composite Materials. Applied Acoustics. 72(2-3): 108-114.
Karlinasari, L., Hermawan, D., Maddu, A., Martianto, B., Lucky, I.K., Nugroho, N. and Hadi, Y.S. 2012. Acoustical Properties of Particleboards Made From Betung Bamboo (Dendrocalamus asper) As Building Construction Material. BioResources. 7(4): 5700-5709.
ALRahman, L. A., Raja, R. I. and Rahman, R. A. 2013. Experimental Study on Natural Fibres for Green Acoustic Absorption Materials. American Journal of Applied Sciences. 10(10): 1307-1314.
Ersoy, S. and Küçük, H. 2009. Investigation of Industrial Tea-Leaf-Fibre Waste Material for Its Sound Absorption Properties. Applied Acoustics. 70(1): 215-220.
ASTM C522. Standard Test Method for Airflow Resistance of Acoustical Materials. 2003.
Davern, W. A. 1977. Perforated Facings Backed With Porous Materials As Sound Absorbers-An Experimental Study. Applied Acoustics. 2(10): 85-112.
Ahsan, Q., Shim, F., Putra, A. and Subramonian,S. 2015. Analysis of Sound Absorption Properties of Spent Tea Leaf. International Design and Concurrent Engineering Conference 2015. Tokushima, Japan. 6-7 September 2015. 1-10.
Koizumi, T., Tsujiuchi, N. and Adachi, A. 2002. The Development of Sound Absorbing Materials Using Natural Bamboo Fibers. High Performance structures and Composites: 157-166.
Seddeq, H. 2009. Factors Influencing Acoustic Performance of Sound Absorptive Materials. Australian Journal of Basic and Applied Sciences. 3(4): 4610-4617.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
