Double layered micro-perforated panel as acoustic absorber in mosque

Poor speech intelligibility in large mosque is still a classical problem in many cases to due to lack of consideration for its acoustic performance in the architectural design of the mosque's interior. This paper presents the assessment of indoor acoustics performance of a mosque by using CATT acoustic software. Double layered micro-perforated panel as the acoustic absorber is introduced. It is aimed at discussing the possibility to utilize the micro-perforated panels, which is new for mosque application instead of the typical porous, fibrous absorbers or the conventional Helmholtz resonator. The results show that the microperforated panels successfully reduce the reverberation time at low frequencies which can improve the speech intelligibility in a mosque.