Analysis of Sound Absorption of Date Palm Fibers Based on Flow Resistivity
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.
Mohd Jailani Mohd Nor, Mohd Zaki Nuawi, Shahrum Abdullah, Rozli Zulkifli, Sallehuddin Mohamed Haris, Zulkifli Mohd Nopiah and Azli Arifin
E. A. Khidir et al., "Analysis of Sound Absorption of Date Palm Fibers Based on Flow Resistivity", Applied Mechanics and Materials, Vol. 471, pp. 285-290, 2014