Year 2022,
Volume: 5 Issue: 2, 104 - 114, 31.12.2022
Festus Adda Naphtali
Adinife Azodo
,
Joseph John Akpan
Smith Okwuchi Onyekwere
References
- Abdul-Latif, H., Yahya, M. N. B., Rafiq, M. N., Sambu, M. A. T. H. A. N., Ghazali, M. I., & Mohamed Hatta, M. N. (2015).A preliminary study on acoustical performance of oil palm mesocarp natural fiber.In Applied Mechanics and Materials (Vol. 773, pp. 247-252). Trans Tech Publications Ltd.
- Abdullah, Y., & Putra, A. (2014).Investigation on sound absorption coefficient of natural paddy fibers. International Journal of Renewable Energy Resources, 3(1), 8-11.
- Abdullah, Y., Putra, A., Effendy, H., Farid, W. M., &Ayob, M. R. (2011a, June). Investigation on natural waste fibers from dried paddy straw as a sustainable acoustic absorber.In 2011 IEEE Conference on Clean Energy and Technology (CET) (pp. 311-314).IEEE.
- Abdullah, Y., Putra, A., Effendy, H., Farid, W., &Ayob, M. (2011b). Dried paddy straw fibers as an acoustic absorber: a preliminary study. International Journal of Renewable Energy Resources 3 (2013), 52-56.
- Abdul-Razak, M. A., Khoo, K. C., and Khozirah, S. (1988). Prospects and potential of the oil palm trunk as a source of lignocellulosic raw material, The Malayan Forester, 51(3), 164-175.
- Aderoju, O.M., Ibrahim, M., Onuoha, H.U., Adebowale, R.K., &Oke, A.B. (2013). Assessment of the level of noise from base transceivers’ station using geospatial techniques: In Abuja Municipal Area Council. IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSRJESTFT), 7(3), 30-39.
- Arenas, J. P. (2016).Applications of acoustic textiles in automotive/transportation.In Acoustic textiles (pp. 143-163).Springer, Singapore.
- Arenas, J. P., & Crocker, M. J. (2010). Recent trends in porous sound-absorbing materials. Sound & vibration, 44(7), 12-18.
- Asdrubali, F. (2006, May).Survey on the acoustical properties of new sustainable materials for noise control.In Proceedings of Euronoise (Vol. 30, pp. 1-10). Tampere: European Acoustics Association.
- Azodo, A.P., &Adejuyigbe S.B. (2013).Examination of noise pollution from generators on the residents of Obantoko, Ogun state, Nigeria. Asian Journal of Engineering, Sciences & Technology, 3(1), 31-41. Retrieved from http://www.ajest.iqra.edu.pk/pdf/download.php?Volume=PFUjfnyeaJs%3D&id=6
- Azodo, A. P., Onwubalili, C., Mezue, T. C., Nwaokocha, C. N., Akpan, U. V. and Giwa, S. O. (2019). Effect of factory process and location on residential area noise level. 3rd International Conference on Engineering for a Sustainable World, Department of Mechanical Engineering, College of Engineering, Covenant University, Ota, Nigeria, 2019.
- Azodo, A.P., Ismaila, S.O., &Owoeye, F.T. (2018).Investigation of occupational noise exposure and its physiological effect on landscape gardeners. Proceedings of the 2018 International Conference on SET: A driving force for sustainable development tagged COLENG 2016, Federal University of Agriculture, Abeokuta, Nigeria.
- Bai M. R., Lo Y-Y., Chen Y. S .Impedance measurement techniques for one-port and two-port networks. The Journal of the Acoustical Society of America 2015:138:2279–90. https://doi.org/10.1121/1.4931440
- Bisong, S. A., Umana, A. N., Onoyom-Ita, V., &Osim, E. E. (2004).Hearing acuity loss of operators of food grinding machines in Calabar, Nigeria. Nigerian Journal of Physiological Sciences, 19(1), 20-26.
- Cao, L., Fu, Q., Si, Y., Ding, B., & Yu, J. (2018).Porous materials for sound absorption. Composites Communications, 10, 25-35.
- Chanlert, P., &Ruamcharoen, P. (2021). Sound absorption properties of rigid polyurethane foam composites with rubber-wood sawdust as a natural filler. In Journal of Physics: Conference Series (Vol. 1719, No. 1, p. 012062). IOP Publishing.
- Čulík, M., Danihelová, A., Ondrejka, V. and Aláč, P. (2020). Sound absorption on board construction materials used in wood buildings. Akustika, 37, 52-57
- D'Alessandro, F., &Pispola, G. (2005, July). Sound absorption properties of sustainable fibrous materials in an enhanced reverberation room. In INTER-NOISE and NOISE-CON Congress and Conference Proceedings (Vol. 2005, No. 6, pp. 2209-2218).Institute of Noise Control Engineering.
- Ersoy S and Kucuk H. (2009) Investigation of industrial tea-leaf-fibre waste material for its sound absorption properties. Applied Acoustics 70, 215 -220.
- Fan, X., Li, L., Zhao, L., He, H., Zhang, D., Ren, Z., & Zhang, Y. (2020). Environmental noise pollution control of substation by passive vibration and acoustic reduction strategies. Applied Acoustics, 165, 107305.
- Farooqi, Z. U. R., Sabir, M., Latif, J., Aslam, Z., Ahmad, H. R., Ahmad, I., Imran, M. &Ilić, P. (2020).Assessment of noise pollution and its effects on human health in industrial hub of Pakistan. Environmental Science and Pollution Research, 27(3), 2819-2828.
- Fatima, S., &Mohanty, A. R. (2011).Acoustical and fire-retardant properties of jute composite materials. Applied acoustics, 72(2-3), 108-114.
- Faustino, J., Pereira, L., Soares, S., Cruz, D., Paiva, A., Varum, H., Ferreira, J. & Pinto, J. (2012). Impact sound insulation technique using corn cob particleboard. Construction and Building Materials, 37, 153-159.
- Fouladi, M. H., Ayub, M., &Nor, M. J. M. (2011). Analysis of coir fiber acoustical characteristics. Applied Acoustics, 72(1), 35-42.
- Gai, X. L., Li, X. H., Zhang, B., Liu, Y. Q., & Xing, T. (2015, March). The sound absorption property of microperforated panel with partitioned cavity. In 2015 International Industrial Informatics and Computer Engineering Conference (pp. 345-348). Atlantis Press.
- Hansen, C.H., &Goelzer, B.I.F. (2001) Engineering Noise control. In: Goelzer, B.I.F., Hanse, C.H., Sehrndt, G.A. (Eds.), Occupational exposure to noise: evaluation, prevention and control (pp. 245-296). Geneva: World Health Organization. Retrieved from https://www.who.int/occupational_health/publications/noise10.pdf
- Joseph, E. B. (1997). Optimal Design of an Enclosure for a Portable Generator. An M. Sc Thesis submitted to the Faculty of the Virginia Polytechnic Institute and State University.
- Kamble P. V., Patil. G. T ,Er. Mali. D. S. (2020). A Study of Noise Pollution in Kolhapur City with Special Reference to Silence Zone. Journal of Trend in Scientific Research and Development, 4(4), 511-514.
- Kassim, M. S. (2017). Experimental study of sound absorption properties of reinforced polyster by some natural materials. The Iraqi Journal For Mechanical And Material Engineering, 17(4), 798-812.
- Khair, F. A., Putra, A., MohdNor, M. J., Atiqah, N., &Selamat, M. Z. (2014). Preliminary Study on Bamboo as Sound Absorber.In Applied Mechanics and Materials (Vol. 554, pp. 76-80). Trans Tech Publications Ltd.
- Koizumi, T., Tsujiuchi, N., & Adachi, A. (2002).The development of sound absorbing materials using natural bamboo fibers. WIT Transactions on The Built Environment, 59, 157-166.
- Masrol, S. R., Rosdin, M. K. R., & Ibrahim, M. N. (2013, July). Sound absorption characteristics of palm oil male flower spikes fiber reinforced composite. In International Conference on Mechanical Engineering Research (ICMER2013) (Vol. 1, p. 3).
- Mathan, S., Musli, N. Y., Hanif, A., Mohamed, N. M. H., Mohd Imran, B. G. (2015).The Acoustical Characteristics Analysis on Different Type of Natural Fibres.In Applied Mechanics and Materials (Vol. 773, pp. 242-246). Trans Tech Publications Ltd.
- Mohd, F.B.M. (2011). Design of a noise enclosure for portable generator (Thesis).UniversitiTeknikal Malaysia Melaka, Durian Tunggal, Malaysia.
- Oguntoke, O., Odeshi, T.A., &Annegarn, H.J. (2012).Assessment of noise emitted by vibrator-block factories and the impact on human health and urban environment in Nigeria. International Journal of Applied Environmental Sciences, 7(1), 57-68.
- Paşayev, N., Kocatepe, S., &Maraş, N. (2019). Investigation of sound absorption properties of nonwoven webs produced from chicken feather fibers. Journal of Industrial Textiles, 48(10), 1616-1635.
- Saad, M. J., & Kamal, I. (2012).Kenaf core particleboard and its sound absorbing properties. Journal of Science and Technology, 4(2).23-33.
- Sampathrajan, A., Vijayaraghavan, N. C., &Swaminathan, K. R. (1991).Acoustic aspects of farm residue-based particle boards. Bioresource technology, 35(1), 67-71.
- Shao, C., Long, H., Cheng, Y., & Liu, X. (2019). Low-frequency perfect sound absorption achieved by a modulus-near-zero metamaterial. Scientific Reports, 9(1), 1-8.
- Sujon, M. A. S., Islam, A., &Nadimpalli, V. K. (2021). Damping and sound absorption properties of polymer matrix composites: A review. Polymer Testing, 104, 107388.
- Taban, E., Khavanin, A., Faridan, M., Samaei, S. E., Samimi, K., &Rashidi, R. (2020). Comparison of acoustic absorption characteristics of coir and date palm fibers: experimental and analytical study of green composites. International Journal of Environmental Science and Technology, 17(1), 39-48.
- Tang, X., & Yan, X. (2017). Acoustic energy absorption properties of fibrous materials: A review. Composites Part A: Applied Science and Manufacturing, 101, 360-380.
- Tang, X., Zhang, X., Zhang, H., Zhuang, X., & Yan, X. (2018). Corn husk for noise reduction: robust acoustic absorption and reduced thickness. Applied Acoustics, 134, 60-68.
- Wang Y, Zhang C, Ren L, Ichchou M, Galland M-A, Bareille O. (2014).Sound absorption of a new bionic multi-layer absorber. Compos Struct, 108, 400–408.
- Witczak, E., Jasińska, I., Lao, M., Krawczyńska, I., &Kamińska, I. (2021). The influence of structural parameters of acoustic panels textile fronts on their sound absorption properties. Applied Acoustics, 178, 107964.
- Wu, Q., Zhang, X., & Cao, G. (2019). Study on the prevention and control measures of China’s urban road traffic noise pollution. In E3S web of conferences (Vol. 96, p. 03003).EDP Sciences.
- Wu, S., Li, X., Qi, X., Li, C., & Xu, T. (2020, June). Study on Noise Pollution of 220kV Substations in Liaoning Province. In IOP Conference Series: Earth and Environmental Science (Vol. 526, No. 1, p. 012048). IOP Publishing.
- Xiang, H., Wang, D., Liua, H., Zhao, N., & Xu, J. (2013).Investigation on sound absorption properties of kapok fibers. Chinese Journal of Polymer Science, 31(3), 521–529.
- Yahya, M. N., & Chin, D. D. V. S. (2017, August).A review on the potential of natural fibre for sound absorption application. In IOP conference series: materials science and engineering (Vol. 226, No. 1, p. 012014). IOP Publishing.
- Yang, H. S., Kim, D. J., & Kim, H. J. (2003).Rice straw–wood particle composite for sound absorbing wooden construction materials. Bioresource technology, 86(2), 117-121.
- Yang, T., Hu, L., Xiong, X., Petrů, M., Noman, M. T., Mishra, R., &Militký, J. (2020). Sound absorption properties of natural fibers: A review. Sustainability, 12(20), 8477.
- Zhu, X., Kim, B. J., Wang, Q., & Wu, Q. (2014). Recent advances in the sound insulation properties of bio-based materials. BioResources, 9(1), 1764-1786.
- Zulkifli, R., Nor, M. M., Ismail, A. R., Nuawi, M. Z., Abdullah, S., Tahir, M. M., & Rahman, M. A. (2009a). Comparison of acoustic properties between coir fibre and oil palm fibre. European Journal of Scientific Research, 33(1), 144-152.
- Zulkifli, R., Nor, M. M., Ismail, A. R., Nuawi, M. Z., & Tahir, M. M. (2009b). Effect of perforated size and air gap thickness on acoustic properties of coir fibre sound absorption panels. European Journal of Scientific Research, 28(2), 242-252.
- Zulkifli, R., Nor, M. M., Tahir, M. M., Ismail, A. R., &Nuawi, M. Z. (2008). Acoustic properties of multi-layer coir fibres sound absorption panel. Journal of Applied Sciences, 8(20), 3709-3714.
An analysis of acoustical absorption characteristics of agro-waste materials
Year 2022,
Volume: 5 Issue: 2, 104 - 114, 31.12.2022
Festus Adda Naphtali
Adinife Azodo
,
Joseph John Akpan
Smith Okwuchi Onyekwere
Abstract
Acoustical materials play several important roles in acoustic engineering such as industrial noise control, noise control of a room, studio and automotive acoustics. This study presents research on the sound absorption properties of recycled agro-waste composite materials. The raw materials used to prepare these composite panels are wastes generated from rice, sugar cane, groundnut, oil palm, and corn. Starch was the matrix material thereby making the composite fully green. Five sound absorption composite panels were produced for the five categories of agro waste by compression moulding method. Sound absorption capacity of the produced composite panels relayed a quality sound absorption coefficients α ranging from 0.72 – 0.86. Increase in thickness of the composite panels resulted to lower sound absorption coefficient which indicates that thickness is an important factor in determining the sound absorption capacity of agro waste based composites. The agro-waste material approach in sound control was effective, cost beneficial and offers an environmentally friendly solution to sound control.
References
- Abdul-Latif, H., Yahya, M. N. B., Rafiq, M. N., Sambu, M. A. T. H. A. N., Ghazali, M. I., & Mohamed Hatta, M. N. (2015).A preliminary study on acoustical performance of oil palm mesocarp natural fiber.In Applied Mechanics and Materials (Vol. 773, pp. 247-252). Trans Tech Publications Ltd.
- Abdullah, Y., & Putra, A. (2014).Investigation on sound absorption coefficient of natural paddy fibers. International Journal of Renewable Energy Resources, 3(1), 8-11.
- Abdullah, Y., Putra, A., Effendy, H., Farid, W. M., &Ayob, M. R. (2011a, June). Investigation on natural waste fibers from dried paddy straw as a sustainable acoustic absorber.In 2011 IEEE Conference on Clean Energy and Technology (CET) (pp. 311-314).IEEE.
- Abdullah, Y., Putra, A., Effendy, H., Farid, W., &Ayob, M. (2011b). Dried paddy straw fibers as an acoustic absorber: a preliminary study. International Journal of Renewable Energy Resources 3 (2013), 52-56.
- Abdul-Razak, M. A., Khoo, K. C., and Khozirah, S. (1988). Prospects and potential of the oil palm trunk as a source of lignocellulosic raw material, The Malayan Forester, 51(3), 164-175.
- Aderoju, O.M., Ibrahim, M., Onuoha, H.U., Adebowale, R.K., &Oke, A.B. (2013). Assessment of the level of noise from base transceivers’ station using geospatial techniques: In Abuja Municipal Area Council. IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSRJESTFT), 7(3), 30-39.
- Arenas, J. P. (2016).Applications of acoustic textiles in automotive/transportation.In Acoustic textiles (pp. 143-163).Springer, Singapore.
- Arenas, J. P., & Crocker, M. J. (2010). Recent trends in porous sound-absorbing materials. Sound & vibration, 44(7), 12-18.
- Asdrubali, F. (2006, May).Survey on the acoustical properties of new sustainable materials for noise control.In Proceedings of Euronoise (Vol. 30, pp. 1-10). Tampere: European Acoustics Association.
- Azodo, A.P., &Adejuyigbe S.B. (2013).Examination of noise pollution from generators on the residents of Obantoko, Ogun state, Nigeria. Asian Journal of Engineering, Sciences & Technology, 3(1), 31-41. Retrieved from http://www.ajest.iqra.edu.pk/pdf/download.php?Volume=PFUjfnyeaJs%3D&id=6
- Azodo, A. P., Onwubalili, C., Mezue, T. C., Nwaokocha, C. N., Akpan, U. V. and Giwa, S. O. (2019). Effect of factory process and location on residential area noise level. 3rd International Conference on Engineering for a Sustainable World, Department of Mechanical Engineering, College of Engineering, Covenant University, Ota, Nigeria, 2019.
- Azodo, A.P., Ismaila, S.O., &Owoeye, F.T. (2018).Investigation of occupational noise exposure and its physiological effect on landscape gardeners. Proceedings of the 2018 International Conference on SET: A driving force for sustainable development tagged COLENG 2016, Federal University of Agriculture, Abeokuta, Nigeria.
- Bai M. R., Lo Y-Y., Chen Y. S .Impedance measurement techniques for one-port and two-port networks. The Journal of the Acoustical Society of America 2015:138:2279–90. https://doi.org/10.1121/1.4931440
- Bisong, S. A., Umana, A. N., Onoyom-Ita, V., &Osim, E. E. (2004).Hearing acuity loss of operators of food grinding machines in Calabar, Nigeria. Nigerian Journal of Physiological Sciences, 19(1), 20-26.
- Cao, L., Fu, Q., Si, Y., Ding, B., & Yu, J. (2018).Porous materials for sound absorption. Composites Communications, 10, 25-35.
- Chanlert, P., &Ruamcharoen, P. (2021). Sound absorption properties of rigid polyurethane foam composites with rubber-wood sawdust as a natural filler. In Journal of Physics: Conference Series (Vol. 1719, No. 1, p. 012062). IOP Publishing.
- Čulík, M., Danihelová, A., Ondrejka, V. and Aláč, P. (2020). Sound absorption on board construction materials used in wood buildings. Akustika, 37, 52-57
- D'Alessandro, F., &Pispola, G. (2005, July). Sound absorption properties of sustainable fibrous materials in an enhanced reverberation room. In INTER-NOISE and NOISE-CON Congress and Conference Proceedings (Vol. 2005, No. 6, pp. 2209-2218).Institute of Noise Control Engineering.
- Ersoy S and Kucuk H. (2009) Investigation of industrial tea-leaf-fibre waste material for its sound absorption properties. Applied Acoustics 70, 215 -220.
- Fan, X., Li, L., Zhao, L., He, H., Zhang, D., Ren, Z., & Zhang, Y. (2020). Environmental noise pollution control of substation by passive vibration and acoustic reduction strategies. Applied Acoustics, 165, 107305.
- Farooqi, Z. U. R., Sabir, M., Latif, J., Aslam, Z., Ahmad, H. R., Ahmad, I., Imran, M. &Ilić, P. (2020).Assessment of noise pollution and its effects on human health in industrial hub of Pakistan. Environmental Science and Pollution Research, 27(3), 2819-2828.
- Fatima, S., &Mohanty, A. R. (2011).Acoustical and fire-retardant properties of jute composite materials. Applied acoustics, 72(2-3), 108-114.
- Faustino, J., Pereira, L., Soares, S., Cruz, D., Paiva, A., Varum, H., Ferreira, J. & Pinto, J. (2012). Impact sound insulation technique using corn cob particleboard. Construction and Building Materials, 37, 153-159.
- Fouladi, M. H., Ayub, M., &Nor, M. J. M. (2011). Analysis of coir fiber acoustical characteristics. Applied Acoustics, 72(1), 35-42.
- Gai, X. L., Li, X. H., Zhang, B., Liu, Y. Q., & Xing, T. (2015, March). The sound absorption property of microperforated panel with partitioned cavity. In 2015 International Industrial Informatics and Computer Engineering Conference (pp. 345-348). Atlantis Press.
- Hansen, C.H., &Goelzer, B.I.F. (2001) Engineering Noise control. In: Goelzer, B.I.F., Hanse, C.H., Sehrndt, G.A. (Eds.), Occupational exposure to noise: evaluation, prevention and control (pp. 245-296). Geneva: World Health Organization. Retrieved from https://www.who.int/occupational_health/publications/noise10.pdf
- Joseph, E. B. (1997). Optimal Design of an Enclosure for a Portable Generator. An M. Sc Thesis submitted to the Faculty of the Virginia Polytechnic Institute and State University.
- Kamble P. V., Patil. G. T ,Er. Mali. D. S. (2020). A Study of Noise Pollution in Kolhapur City with Special Reference to Silence Zone. Journal of Trend in Scientific Research and Development, 4(4), 511-514.
- Kassim, M. S. (2017). Experimental study of sound absorption properties of reinforced polyster by some natural materials. The Iraqi Journal For Mechanical And Material Engineering, 17(4), 798-812.
- Khair, F. A., Putra, A., MohdNor, M. J., Atiqah, N., &Selamat, M. Z. (2014). Preliminary Study on Bamboo as Sound Absorber.In Applied Mechanics and Materials (Vol. 554, pp. 76-80). Trans Tech Publications Ltd.
- Koizumi, T., Tsujiuchi, N., & Adachi, A. (2002).The development of sound absorbing materials using natural bamboo fibers. WIT Transactions on The Built Environment, 59, 157-166.
- Masrol, S. R., Rosdin, M. K. R., & Ibrahim, M. N. (2013, July). Sound absorption characteristics of palm oil male flower spikes fiber reinforced composite. In International Conference on Mechanical Engineering Research (ICMER2013) (Vol. 1, p. 3).
- Mathan, S., Musli, N. Y., Hanif, A., Mohamed, N. M. H., Mohd Imran, B. G. (2015).The Acoustical Characteristics Analysis on Different Type of Natural Fibres.In Applied Mechanics and Materials (Vol. 773, pp. 242-246). Trans Tech Publications Ltd.
- Mohd, F.B.M. (2011). Design of a noise enclosure for portable generator (Thesis).UniversitiTeknikal Malaysia Melaka, Durian Tunggal, Malaysia.
- Oguntoke, O., Odeshi, T.A., &Annegarn, H.J. (2012).Assessment of noise emitted by vibrator-block factories and the impact on human health and urban environment in Nigeria. International Journal of Applied Environmental Sciences, 7(1), 57-68.
- Paşayev, N., Kocatepe, S., &Maraş, N. (2019). Investigation of sound absorption properties of nonwoven webs produced from chicken feather fibers. Journal of Industrial Textiles, 48(10), 1616-1635.
- Saad, M. J., & Kamal, I. (2012).Kenaf core particleboard and its sound absorbing properties. Journal of Science and Technology, 4(2).23-33.
- Sampathrajan, A., Vijayaraghavan, N. C., &Swaminathan, K. R. (1991).Acoustic aspects of farm residue-based particle boards. Bioresource technology, 35(1), 67-71.
- Shao, C., Long, H., Cheng, Y., & Liu, X. (2019). Low-frequency perfect sound absorption achieved by a modulus-near-zero metamaterial. Scientific Reports, 9(1), 1-8.
- Sujon, M. A. S., Islam, A., &Nadimpalli, V. K. (2021). Damping and sound absorption properties of polymer matrix composites: A review. Polymer Testing, 104, 107388.
- Taban, E., Khavanin, A., Faridan, M., Samaei, S. E., Samimi, K., &Rashidi, R. (2020). Comparison of acoustic absorption characteristics of coir and date palm fibers: experimental and analytical study of green composites. International Journal of Environmental Science and Technology, 17(1), 39-48.
- Tang, X., & Yan, X. (2017). Acoustic energy absorption properties of fibrous materials: A review. Composites Part A: Applied Science and Manufacturing, 101, 360-380.
- Tang, X., Zhang, X., Zhang, H., Zhuang, X., & Yan, X. (2018). Corn husk for noise reduction: robust acoustic absorption and reduced thickness. Applied Acoustics, 134, 60-68.
- Wang Y, Zhang C, Ren L, Ichchou M, Galland M-A, Bareille O. (2014).Sound absorption of a new bionic multi-layer absorber. Compos Struct, 108, 400–408.
- Witczak, E., Jasińska, I., Lao, M., Krawczyńska, I., &Kamińska, I. (2021). The influence of structural parameters of acoustic panels textile fronts on their sound absorption properties. Applied Acoustics, 178, 107964.
- Wu, Q., Zhang, X., & Cao, G. (2019). Study on the prevention and control measures of China’s urban road traffic noise pollution. In E3S web of conferences (Vol. 96, p. 03003).EDP Sciences.
- Wu, S., Li, X., Qi, X., Li, C., & Xu, T. (2020, June). Study on Noise Pollution of 220kV Substations in Liaoning Province. In IOP Conference Series: Earth and Environmental Science (Vol. 526, No. 1, p. 012048). IOP Publishing.
- Xiang, H., Wang, D., Liua, H., Zhao, N., & Xu, J. (2013).Investigation on sound absorption properties of kapok fibers. Chinese Journal of Polymer Science, 31(3), 521–529.
- Yahya, M. N., & Chin, D. D. V. S. (2017, August).A review on the potential of natural fibre for sound absorption application. In IOP conference series: materials science and engineering (Vol. 226, No. 1, p. 012014). IOP Publishing.
- Yang, H. S., Kim, D. J., & Kim, H. J. (2003).Rice straw–wood particle composite for sound absorbing wooden construction materials. Bioresource technology, 86(2), 117-121.
- Yang, T., Hu, L., Xiong, X., Petrů, M., Noman, M. T., Mishra, R., &Militký, J. (2020). Sound absorption properties of natural fibers: A review. Sustainability, 12(20), 8477.
- Zhu, X., Kim, B. J., Wang, Q., & Wu, Q. (2014). Recent advances in the sound insulation properties of bio-based materials. BioResources, 9(1), 1764-1786.
- Zulkifli, R., Nor, M. M., Ismail, A. R., Nuawi, M. Z., Abdullah, S., Tahir, M. M., & Rahman, M. A. (2009a). Comparison of acoustic properties between coir fibre and oil palm fibre. European Journal of Scientific Research, 33(1), 144-152.
- Zulkifli, R., Nor, M. M., Ismail, A. R., Nuawi, M. Z., & Tahir, M. M. (2009b). Effect of perforated size and air gap thickness on acoustic properties of coir fibre sound absorption panels. European Journal of Scientific Research, 28(2), 242-252.
- Zulkifli, R., Nor, M. M., Tahir, M. M., Ismail, A. R., &Nuawi, M. Z. (2008). Acoustic properties of multi-layer coir fibres sound absorption panel. Journal of Applied Sciences, 8(20), 3709-3714.