Acoustic modeling of single layer coir fiber panel

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

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

2 Citations (Scopus)

Abstract

A research is initiated in Universiti Kebangsaan Malaysia to model the acoustic absorption of coir fiber. This natural porous material may be obtained in two types; natural fiber without any additives and the industrial type that is treated with binder. Biot-Allard model is implemented for acoustic modelling of fiber. Experimental validation supports the outcomes of the modelling technique. Results show that fresh coir fiber has an average absorption coefficient of 0.8 at f <1360 Hz and 20 mm thickness. Increasing the thickness has improved the sound absorption in lower frequencies, having the same average at f <940 Hz and 30 mm thickness. Biot-Allard model should be compensated for the industrial prepared fiber considering the binder additive. This form generally shows poor acoustical absorption in low frequencies. Inevitably, fiber has to be mixed with additives in commercial use to enhance its characteristics such as stiffness, unti-fungus and flammability. Hence other approaches such as adding air gap or perforated plate should be used to improve the acoustical properties of industrial treated coir fiber.

Original languageEnglish
Title of host publication17th International Congress on Sound and Vibration 2010, ICSV 2010
Pages3123-3130
Number of pages8
Volume4
Publication statusPublished - 2010
Event17th International Congress on Sound and Vibration 2010, ICSV 2010 - Cairo
Duration: 18 Jul 201022 Jul 2010

Other

Other17th International Congress on Sound and Vibration 2010, ICSV 2010
CityCairo
Period18/7/1022/7/10

Fingerprint

fibers
acoustics
perforated plates
low frequencies
Malaysia
flammability
fungi
sound transmission
porous materials
stiffness
absorptivity
air

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Fouladi, M. H., Mohd Nor, M. J., & Ayub, N. M. (2010). Acoustic modeling of single layer coir fiber panel. In 17th International Congress on Sound and Vibration 2010, ICSV 2010 (Vol. 4, pp. 3123-3130)

Acoustic modeling of single layer coir fiber panel. / Fouladi, Mohammad Hossein; Mohd Nor, Mohd. Jailani; Ayub, Nor Md.

17th International Congress on Sound and Vibration 2010, ICSV 2010. Vol. 4 2010. p. 3123-3130.

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

Fouladi, MH, Mohd Nor, MJ & Ayub, NM 2010, Acoustic modeling of single layer coir fiber panel. in 17th International Congress on Sound and Vibration 2010, ICSV 2010. vol. 4, pp. 3123-3130, 17th International Congress on Sound and Vibration 2010, ICSV 2010, Cairo, 18/7/10.
Fouladi MH, Mohd Nor MJ, Ayub NM. Acoustic modeling of single layer coir fiber panel. In 17th International Congress on Sound and Vibration 2010, ICSV 2010. Vol. 4. 2010. p. 3123-3130
Fouladi, Mohammad Hossein ; Mohd Nor, Mohd. Jailani ; Ayub, Nor Md. / Acoustic modeling of single layer coir fiber panel. 17th International Congress on Sound and Vibration 2010, ICSV 2010. Vol. 4 2010. pp. 3123-3130
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