Acustic of mosque : the effect of roof shape on it's acoustic performance

Mohd Arif , Zaulkefli (2013) Acustic of mosque : the effect of roof shape on it's acoustic performance. Project Report. UTeM. (Submitted)

Text ACUSTIC OF MOSQUE THE EFFECT OF ROOF SHAPE ON IT'S ACOUSTIC PERFORMANCE 24 pages.pdf Download (5MB)

Abstract

Speech intelligibility has been found to be a major concern in mosques due to lack of acoustical concern of their design stage. Speech intelligibility is a major concern in mosque acoustical design. The design of roof can be one of the contributors to a poor speech intelligibility inside a mosque. This study investigates the acoustical performance of different roof shapes of commonly built forms of mosque utilizing room-acoustics computer models. Simulation of three different roof shapes namely dome, pyramidal and flat shapes are conducted using the CA TT indoor acoustic software to obtain acoustic parameters such as Reverberation Time (RT-30), Early Decay Time (EDT), Clarity (C-80), Lateral Fraction (LF), Definition (D-50) and Speech Transmission Index (STI). The purpose of this project is to identify the effect of the roof shapes on its acoustical performance, particularly on the spatial distribution patterns of speech intelligibility in the absence of sound reinforcement system. Speech intelligibility contours were quantified and compared to characterize acoustics merits, dissimilarities and overall acoustics performance. The gaining of the knowledge of the acoustical performance of mosque give positive and good reflection of the results. Therefore, it is confirmed that with the large volume of mosque and the different type of ceilings, acoustical performance can be improved with the help of acoustic materials and resonators which it can help in performing well in reducing the reflected sound energy especially for the late energy reflections.

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