Sound Absorption Properties of a Low Density Date Palm Fibers Panel

2014 ◽  
pp. 63-76
Author(s):  
A. K. Elwaleed ◽  
N. Nikabdullah ◽  
M. J. M. Nor ◽  
M. F. M. Tahir ◽  
R. Zulkifli
Keyword(s):  
Sound Absorption ◽  
Date Palm ◽  
Low Density ◽  
Absorption Properties ◽  
Date Palm Fibers

A Preliminary Study on the Sound Absorption of Self-Facing Date Palm Fibers

2014 ◽  
Vol 565 ◽  
pp. 25-30 ◽  
Author(s):  
Elwaleed A. Khidir ◽  
N. Nikabdullah ◽  
M.J.M. Nor ◽  
M.F.Mat Tahir ◽  
M.Z. Nuawi
Keyword(s):  
Sound Absorption ◽  
Date Palm ◽  
Perforated Plate ◽  
Low Frequency ◽  
Single Layer ◽  
Absorption Properties ◽  
Date Palm Fibers ◽  
Layer Sample ◽  
Good Improvement ◽  
Preliminary Study

Sound absorption of self-facing natural date palm fibershas been investigated.A single layer sample of the fibers was tested for its sound absorption properties. The sample was then faced with the originally date palm fiber netted structure. Experimental measurements were conducted on the impedance tube at the acoustic lab, Faculty of Engineering, UniversitiKebangsaan Malaysia, to determine the sound absorption coefficient.The single layer was also tested using an aluminum perforated plate, as facing, for comparison purposes.The results show a good improvement in the sound absorption for the self-facing panel for the whole frequency range. However, when using the aluminum perforated panel an improvement in the sound absorption was observed only above 2500 Hz. The effect of introducing air gap thickness was studied. The results show improvement for the sound absorption the low frequency.

Sound absorption properties of a low-density perforated date palm fibres panel

2015 ◽  
Vol 52 (4) ◽  
pp. 213 ◽  
Author(s):  
A.K. Elwaleed ◽  
N. Nikabdullah ◽  
M.J.M. Nor ◽  
M.F.M. Tahir ◽  
R. Zulkifli
Keyword(s):  
Sound Absorption ◽  
Date Palm ◽  
Low Density ◽  
Absorption Properties

Effect of Density on the Sound Absorption of Date Palm Fibers

2014 ◽  
Vol 663 ◽  
pp. 437-441 ◽  
Author(s):  
Elwaleed Awad Khidir ◽  
Nik Abdullah Nik Mohamed ◽  
Mohd Jailani Mohd Nor ◽  
Mohd Faizal Mat Tahir ◽  
Rozli Zulkifli ◽  
...  
Keyword(s):  
Experimental Study ◽  
Built Environment ◽  
Absorption Coefficient ◽  
Noise Reduction ◽  
Sound Absorption ◽  
Date Palm ◽  
Absorption Properties ◽  
Palm Fiber ◽  
Date Palm Fibers ◽  
Reduction Coefficient

An experimental study on the effect of panel density on the sound absorption properties of a date palm fiber panel has been presented in this paper. The experiments were carried out by using impedance tube at the Acoustic Lab, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia. The date palm fiber was tested for densities of 77 kg/m3, 100 kg/m3 and 125 kg/m3.The results show that the values of absorption coefficient improve when increasing the density of the panel. Noise reduction coefficient (NRC) was computed to compare the performance of the palm date fiber samples for the different densities. The NRC increases by increasing the density.

scholarly journals Experimental and mathematical survey of sound absorption performance of date palm fibers

Heliyon ◽  
2019 ◽  
Vol 5 (6) ◽  
pp. e01977 ◽  
Author(s):  
Ebrahim Taban ◽  
Ali Khavanin ◽  
Ahmad Jonidi Jafari ◽  
Mohammad Faridan ◽  
Ali Kazemi Tabrizi
Keyword(s):  
Sound Absorption ◽  
Date Palm ◽  
Date Palm Fibers ◽  
Absorption Performance

Analysis of Sound Absorption of Date Palm Fibers Based on Flow Resistivity

2013 ◽  
Vol 471 ◽  
pp. 285-290 ◽  
Author(s):  
Elwaleed Awad Khidir ◽  
Mojahed Osman Mohammed Ali ◽  
Mohammed Mustafa Ali ◽  
Mohd Faizal Bin Mat Tahir ◽  
Rozli Zulkifli
Keyword(s):  
Absorption Coefficient ◽  
Sound Absorption ◽  
Date Palm ◽  
Single Layer ◽  
Sound Absorption Coefficient ◽  
Low Frequencies ◽  
Palm Fiber ◽  
Date Palm Fibers ◽  
Flow Resistivity ◽  
Fiber Sample

This paper presents a study on the sound absorption properties of a single layer date palm fiber based on the flow resistivity. Experimental measurements were carried out to estimate the flow resistivity value using differential pressure tube. The average diameter of the fibers is 0.462 mm. A date palm fiber sample of 25mm thickness is used in this research. The flow resistivity of the date palm fiber sample was found to be 4.26 kPa.s/m2. The flow resistivity was used to calculate the sound absorption coefficient using Delany and Bazley model. The simulation showed that the values of absorption coefficient are small at low frequencies and rising with increasing frequency. To check the effect of flow resistivity on the sound absorption coefficient Delany and Bazley model was simulated for three different flow resistivity values. The simulation results showed that the sound absorption coefficient increases with the increase of the flow resistivity.

A Preliminary Study on the Sound Absorption of Date Palm Fibers

2014 ◽  
Vol 663 ◽  
pp. 406-410
Author(s):  
Elwaleed Awad Khidir ◽  
Nik Abdullah Nik Mohamed ◽  
Mohd Jailani Mohd Nor ◽  
Mohd Faizal Mat Tahir ◽  
Rozli Zulkifli
Keyword(s):  
Sound Absorption ◽  
Date Palm ◽  
Single Layer ◽  
Air Gap ◽  
Constant Thickness ◽  
Frequency Range ◽  
Low Frequencies ◽  
Palm Fiber ◽  
Date Palm Fibers ◽  
Absorption Performance

In this study sound absorption properties of a single layer date palm fiber has been investigated. Experimental measurements were carried out using impedance tube at the acoustic lab, Faculty of Engineering, Universiti Kebangsaan Malaysia. A constant thickness sample was considered in this study.The results show that the values of absorption coefficient are small at low frequencies, rising with increasing frequency but exhibiting a significant peak. The low density of the sample is reflected in the overall sound absorption performance of the date palm fiber. An improvement in the sound absorption in the lower frequency range was achieved by backing the sample with air gap of different thicknesses of 10 mm, 20 mm and 30 mm. The increase in the air gap thickness moved the peaks toward lower frequencies and improved the low frequencies absorption. However, that increase coincided with reduction of absorption in medium frequency range and reduction in the absorption peak. A linear relationship was found between sound absorption peaks and the air gap thickness. The performance of the date palm fiber can be improved by increasing the density of the sample, using different sample thicknesses and adding perforated plates to the date palm fiber panel.

Evaluation Of Qualification Of Substrates Containing Date Palm Fibers ( Leef ) And Sawdust On Quality And Productivity Of Four Pleurotus Spp

2016 ◽  
pp. 1
Author(s):  
مصطفى ناظم عوبد الهيتى ◽  
ساجد صلاح الدين سليم السعدى ◽  
ادهام على عبدالعسافى
Keyword(s):  
Date Palm ◽  
Date Palm Fibers
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