DocumentCode :
3452416
Title :
Sound absorption coefficient of direct piercing carved wood panel with uniform geometric patterns
Author :
Dimon, Mohamad Ngasri ; Hashim, A.W.I. ; Abdul Hamid, Siti Zaleha ; Harun, Mokhtar ; Rahman, F.A. ; Adzim Muhamod Adzim, Siti Dhalia ; Kit, M.H.
Author_Institution :
Fac. of Electr. Eng., Univ. Teknol. Malaysia, Skudai, Malaysia
fYear :
2009
fDate :
14-15 Dec. 2009
Firstpage :
1
Lastpage :
5
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.
Keywords :
acoustic variables measurement; acoustic wave absorption; acoustic wave reflection; boundary-elements methods; construction; structural acoustics; walls; wood; boundary element method; direct piercing carved wood panel; mosque construction; sound absorber material; sound absorption coefficient; sound intensity measurements technique; sound reflection; speech intelligibility optimization; uniform geometric patterns; wall panel; Absorption; Acoustic materials; Acoustic reflection; Apertures; Boundary element methods; Conducting materials; Measurement techniques; Resonance; Resonant frequency; Speech;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Technical Postgraduates (TECHPOS), 2009 International Conference for
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4244-5223-1
Electronic_ISBN :
978-1-4244-5224-8
Type :
conf
DOI :
10.1109/TECHPOS.2009.5412075
Filename :
5412075
Link To Document :
بازگشت