Effect of porosity on the use of multiple perforated plates with coir fiber acoustic absorber

M. Ayub, Mohd. Jailani Mohd Nor, Rozli Zulkifli, Mohammad Hosseini Fouladi, Nowshad Amin

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

Abstract

The objective of this work is to explore and analyze the effect of porosity on the use of multiple perforated plate (hereafter PP) implemented with coir fiber acoustic absorber. Previously developed analytical method for multilayer PP absorber employing Allard and Sgard model together with acoustic transmission approach and Johnson-Allard rigid frame model was utilized to estimate the absorption coefficient of the absorber in different conditions. The verification of the estimated acoustical absorption coefficient for multiple PP absorber using the developed method are shown for two different combination compromises of two PP, coir fiber and or air gap. Measurements were conducted in impedance tube on normal incidence sound absorption of the panel. It shows that the presented analytical method can provide a favorable and consistent agreement with the experimental results. Therefore, it was anticipated that this analytical approach can be used efficiently for exploring and analyzing the factor that may significantly contributes and control the absorption behavior of multiple PP absorber in the use of coir fiber. In this research, only two layer PP absorbers are analyzed to describe the characteristic factors as a preliminary study for multiple PP absorbers. The acoustic features of the multiple PP acoustic absorbers such as effect of PP porosity with the variation of arrangement of PPs and backing compartment employed with PP are discussed in details. Those elements seem to have a significant contribution on the absorption characteristics of the absorber. In addition, it was noticed that porosities of PP can be engineered based on performance of the panel and designed for developing an effective coir fiber absorber utilizing multiple PP in future. Moreover, some recommendations were made based on the results of the analysis. Furthermore, these result presented here encourage more awareness during the real application of coir fiber in acoustics with multiple PP system.

Original languageEnglish
Title of host publication18th International Congress on Sound and Vibration 2011, ICSV 2011
Pages2190-2197
Number of pages8
Volume3
Publication statusPublished - 2011
Event18th International Congress on Sound and Vibration 2011, ICSV 2011 - Rio de Janeiro
Duration: 10 Jul 201114 Jul 2011

Other

Other18th International Congress on Sound and Vibration 2011, ICSV 2011
CityRio de Janeiro
Period10/7/1114/7/11

Fingerprint

perforated plates
absorbers
porosity
fibers
acoustics
absorptivity
backups
sound transmission
compartments
recommendations
incidence
impedance

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Ayub, M., Mohd Nor, M. J., Zulkifli, R., Fouladi, M. H., & Amin, N. (2011). Effect of porosity on the use of multiple perforated plates with coir fiber acoustic absorber. In 18th International Congress on Sound and Vibration 2011, ICSV 2011 (Vol. 3, pp. 2190-2197)

Effect of porosity on the use of multiple perforated plates with coir fiber acoustic absorber. / Ayub, M.; Mohd Nor, Mohd. Jailani; Zulkifli, Rozli; Fouladi, Mohammad Hosseini; Amin, Nowshad.

18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 3 2011. p. 2190-2197.

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

Ayub, M, Mohd Nor, MJ, Zulkifli, R, Fouladi, MH & Amin, N 2011, Effect of porosity on the use of multiple perforated plates with coir fiber acoustic absorber. in 18th International Congress on Sound and Vibration 2011, ICSV 2011. vol. 3, pp. 2190-2197, 18th International Congress on Sound and Vibration 2011, ICSV 2011, Rio de Janeiro, 10/7/11.
Ayub M, Mohd Nor MJ, Zulkifli R, Fouladi MH, Amin N. Effect of porosity on the use of multiple perforated plates with coir fiber acoustic absorber. In 18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 3. 2011. p. 2190-2197
Ayub, M. ; Mohd Nor, Mohd. Jailani ; Zulkifli, Rozli ; Fouladi, Mohammad Hosseini ; Amin, Nowshad. / Effect of porosity on the use of multiple perforated plates with coir fiber acoustic absorber. 18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 3 2011. pp. 2190-2197
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