Utilization of air-gap to improve the acoustic absorption of coir fiber

Mohammad Hosseini Fouladi, Mohd. Jailani Mohd Nor, Md Ayub

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

Abstract

The aim of this paper is to improve the coir fiber acoustical properties with air gap layers. Analyses were based on Allard elastic model with transfer matrix analysis. Results were close to experimental values and predicted the path and resonances very well. Further analyses derived that having a fiber layer backed by an air gap was better than leaving the same gap in between that layer. In the later arrangement, the sound field impacted a porous layer with low thickness and bulk density. It was concluded that other acoustic absorption techniques such as adding perforated plate may be combined with coir fiber-air gap structure to improve the low frequency acoustic absorption coefficient without any need to highly increase the air gap thickness.

Original languageEnglish
Title of host publication18th International Congress on Sound and Vibration 2011, ICSV 2011
Pages2944-2951
Number of pages8
Volume4
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

fibers
acoustics
air
perforated plates
sound fields
absorptivity
low frequencies

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Fouladi, M. H., Mohd Nor, M. J., & Ayub, M. (2011). Utilization of air-gap to improve the acoustic absorption of coir fiber. In 18th International Congress on Sound and Vibration 2011, ICSV 2011 (Vol. 4, pp. 2944-2951)

Utilization of air-gap to improve the acoustic absorption of coir fiber. / Fouladi, Mohammad Hosseini; Mohd Nor, Mohd. Jailani; Ayub, Md.

18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 4 2011. p. 2944-2951.

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

Fouladi, MH, Mohd Nor, MJ & Ayub, M 2011, Utilization of air-gap to improve the acoustic absorption of coir fiber. in 18th International Congress on Sound and Vibration 2011, ICSV 2011. vol. 4, pp. 2944-2951, 18th International Congress on Sound and Vibration 2011, ICSV 2011, Rio de Janeiro, 10/7/11.
Fouladi MH, Mohd Nor MJ, Ayub M. Utilization of air-gap to improve the acoustic absorption of coir fiber. In 18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 4. 2011. p. 2944-2951
Fouladi, Mohammad Hosseini ; Mohd Nor, Mohd. Jailani ; Ayub, Md. / Utilization of air-gap to improve the acoustic absorption of coir fiber. 18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 4 2011. pp. 2944-2951
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