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The effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness

Interim semester 2020 / 2021

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Bibliographic Details
Main Author: Ahmad Azim Imran Zaidin
Format: text
Published: 2023
Subjects:
Sound absorber
Density
Fibreboard
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spelling my.uniten.dspace-213762023-12-07T09:16:14Z The effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness Ahmad Azim Imran Zaidin Sound absorber Density Fibreboard Interim semester 2020 / 2021 ABSTRACT Palm oil is the most efficient oleaginous trim worldwide. Malaysia is one of the world's leading palm oil producers and exporters. In Malaysia almost 4,49 million hectares of oil palm grown, and 17,73 million tons of palm oil and 2,13 tons of palm kernel olive oil are produced in a single year. Oil palm waste in Malaysia thus posed a significant problem of waste disposal. The usage of the oil palm products such as empty fruit bunch (EFB) fibres can reduce the current wastage. This research focused on the acoustic performance of EFB fibres as a sound absorber using constant thickness at 16 mm and different densities of 120 kg/m3, 140 kg/m3, 160 kg/m3 and 180 kg/m3. There are two different fibre types, which are the short strand fibre and the fined fibre,which show different results on sound absorption coefficient (SAC) value. Furthermore, short strand fibre shows the result of increasing density can enhance SAC value (α = 0.92) at 4424 Hz for 180 kg/m3 which is the highest SAC value for the short strand fibres. Moreover, the fined fibre recorded a significant result, where the lowest density (120 kg/m3) achieved the highest SAC value of α = 1.00, which is a total sound absorption at 4264 Hz. As the density increases, the maximum SAC value achieved for each sample starts to decrease. The results also compared the same density with different fibre types of 160 kg/m3 and 180 kg/m3 samples undergo cross-point where the short strand fibres have better sound absorption at high frequency range which is at the range of 4250 – 6000 Hz while fined fibres have better sound absorption at lower frequency range at 500 – 4250 Hz. 2023-05-03T16:43:27Z 2023-05-03T16:43:27Z 2020-09 Resource Types::text https://irepository.uniten.edu.my/handle/123456789/21376 application/pdf
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
topic Sound absorber
Density
Fibreboard
spellingShingle Sound absorber
Density
Fibreboard
Ahmad Azim Imran Zaidin
The effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness
description Interim semester 2020 / 2021
format Resource Types::text
author Ahmad Azim Imran Zaidin
author_facet Ahmad Azim Imran Zaidin
author_sort Ahmad Azim Imran Zaidin
title The effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness
title_short The effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness
title_full The effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness
title_fullStr The effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness
title_full_unstemmed The effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness
title_sort effects of different densities on structure and acoustic properties of oil palm empty fruit bunch with the thickness
publishDate 2023
_version_ 1806423396822548480
score 13.209306

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