Sound absorption performance of oil palm empty fruit bunch fibers

Or Khai Hee, Azma Putra, Mohd. Jailani Mohd Nor, Mohd Zulkefli Selamat, Lim Zhi Ying

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The conventional acoustic absorbers are made from synthetic materials which are not only causing global warming and pollutions during its production, but also harmful to human. Thus, scientists have turned their attention to find sustainable and 'green' materials which have the potential to replace synthetic materials. Oil Palm Empty Fruit Bunch (OPEFB) fiber is a biodegradable material and is available in abundance quantity as agricultural waste in Malaysia. In this study, sound absorption performance of OPEFB fiber is investigated. The impedance tube testing according to ISO 10534-2 was conducted to measure the sound absorption coefficient. Samples of raw OPEFB fibers with different masses and thicknesses are tested. In the experimental work, the effects of fiber density (or fiber mass), thickness and air gap on sound absorption coefficient are explored. Increment in fiber density showed improvement of sound absorption performance in high frequency region. The increase in thickness and application of air gap enhanced the sound absorption performance, especially at lower frequency region. At thickness of 50 mm, OPEFB fibers with density of 292 kg/m3 showed good sound absorption performance where the sound absorption coefficient achieved 0.9 in average above 1 kHz. Comparison with industrial acoustic rock wool showed that OPEFB fibers possess similar sound absorption performance at the same thickness of 50 mm. Delany-Bazley model is used to validate the experimental work. It is found that the mathematical model is able to predict the trend of the sound absorption performance curve with minor deviation.

Original languageEnglish
Title of host publicationICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics
PublisherInternational Institute of Acoustics and Vibrations
ISBN (Electronic)9789609922623
Publication statusPublished - 2016
Externally publishedYes
Event23rd International Congress on Sound and Vibration, ICSV 2016 - Athens, Greece
Duration: 10 Jul 201614 Jul 2016

Other

Other23rd International Congress on Sound and Vibration, ICSV 2016
CountryGreece
CityAthens
Period10/7/1614/7/16

Fingerprint

Palm oil
fruits
sound transmission
Fruits
oils
Acoustic waves
fibers
Fibers
absorptivity
Acoustics
Malaysia
wool
Agricultural wastes
global warming
acoustics
air
Global warming
Air
pollution
Wool

ASJC Scopus subject areas

  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality
  • Acoustics and Ultrasonics

Cite this

Hee, O. K., Putra, A., Mohd Nor, M. J., Selamat, M. Z., & Ying, L. Z. (2016). Sound absorption performance of oil palm empty fruit bunch fibers. In ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics International Institute of Acoustics and Vibrations.

Sound absorption performance of oil palm empty fruit bunch fibers. / Hee, Or Khai; Putra, Azma; Mohd Nor, Mohd. Jailani; Selamat, Mohd Zulkefli; Ying, Lim Zhi.

ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics. International Institute of Acoustics and Vibrations, 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hee, OK, Putra, A, Mohd Nor, MJ, Selamat, MZ & Ying, LZ 2016, Sound absorption performance of oil palm empty fruit bunch fibers. in ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics. International Institute of Acoustics and Vibrations, 23rd International Congress on Sound and Vibration, ICSV 2016, Athens, Greece, 10/7/16.
Hee OK, Putra A, Mohd Nor MJ, Selamat MZ, Ying LZ. Sound absorption performance of oil palm empty fruit bunch fibers. In ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics. International Institute of Acoustics and Vibrations. 2016
Hee, Or Khai ; Putra, Azma ; Mohd Nor, Mohd. Jailani ; Selamat, Mohd Zulkefli ; Ying, Lim Zhi. / Sound absorption performance of oil palm empty fruit bunch fibers. ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics. International Institute of Acoustics and Vibrations, 2016.
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