Effect of different factors on the acoustic absorption of coir fiber

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

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The aim of this study was to explore and analyze the effect of different factors on the absorption of coir fiber using the developed analytical techniques employing Johns on-Allard rigid frame model. Estimated results were verified by the measurements conducted in impedance tube on normal incidence sound absorption of coir fiber. It was found that the developed analytical method can provide a well consistent agreement with the experimental results. Factors that may have positive or negative effect are elaborated in this study. It describes how the physical elements of coir fiber absorber panel can change the absorption behavior. Results obtained show that layer thickness and fiber diameter have a significant effect on the absorption, whereas bulk density does not have any considerable effect. In addition, an example is presented in order to show the approaches of enhancing the absorption utilizing the advantage of modification in the physical elements. It exhibits that properly chosen fibers along with suitable amount of bulk density can increase the absorption for the same layer thickness. It indicates that these analyses can be powerfully exploited to improve the absorption of coir fiber and at the same time maintain a reasonable thickness which would be veiy efficient for limited space structure. Moreover, these results can serve as a guideline for the future implementation of acoustic absorber using naturally collected coir fiber.

Original languageEnglish
Pages (from-to)2887-2892
Number of pages6
JournalJournal of Applied Sciences
Volume10
Issue number22
Publication statusPublished - 2010

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fibers
acoustics
absorbers
sound transmission
incidence
impedance
tubes

Keywords

  • Acoustic absorption coefficient
  • Bulk density
  • Coir fiber
  • Fiber size
  • Layer thickness
  • Porous material

ASJC Scopus subject areas

  • General

Cite this

Effect of different factors on the acoustic absorption of coir fiber. / Mohd Nor, Mohd. Jailani; Ayub, Md; Zulkifli, Rozli; Amin, Nowshad; Fouladi, Mohammad Hosseini.

In: Journal of Applied Sciences, Vol. 10, No. 22, 2010, p. 2887-2892.

Research output: Contribution to journalArticle

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