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Sound absorption coefficient of direct piercing carved wood panel with uniform geometric patterns

Dimon, Mohamad Ngasri and Hashim, Abdul Wahab Ishari and Abdul Hamid, Siti Zaleha and Harun, Mokhtar and Abdul Rahman, Fareha and Muhamod Adzim, Siti Dhalia Adzim and Kit, Mun Hou (2009) Sound absorption coefficient of direct piercing carved wood panel with uniform geometric patterns. In: International Conference for Technical Postgraduates (TECHPOS 2009), 2009, Hotel Legend, K. Lumpur.

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Official URL: http://dx.doi.org/10.1109/TECHPOS.2009.5412075

Abstract

Direct piercing carved wood panels (DPCWP) have been used as part of the wall panel for mosques in this country. Among the earliest used of DPCWP is as in Masjid Sultan Zainal Abidin in 1700s, Kuala Terengganu, Terengganu. It is envisage, the use of DPCWP is to help in achieving good speech intelligibility inside. This is considering DPCWP allowing sound waves to pass through, hence sound reflection to the main prayer is contain. Minimizing sound reflection toward the mosque main area, ensuring optimization of speech intelligibility. DPCWP has the ability to allow sound waves to pass through the panel. This qualifies DPCWP as sound absorber material. This as Sabine, Kutruff and Maekawa definition of sound absorption coefficient. In this paper the sound absorption coefficient of DPCWP with uniform geometric patterns are discussed. The perforation ratios are 31% and 37%. Numerical experiments were conducted using boundary element method (BEM). The measured results were obtained using sound intensity measurements technique. Comparison of sound absorption coefficient obtained through numerical experiment and measured using sound intensity are discussed in details. Analysis of resonance frequencies due to types and sizes of apertures in relation to sound absorption coefficient also highlighted. The measured and numerical results suggest, DPCWP of uniform geometric patterns indeed able to act as good sound absorber. This finding allows DPCWP to be used as sound absorber more effectively in future mosque construction.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:15764
Deposited By: Liza Porijo
Deposited On:10 Oct 2011 07:17
Last Modified:10 Oct 2011 07:17

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