The need for good to excellent speech intelligibility (SI) is fundamental to the design of auditoriums, lecture halls as well as mosques since good SI is central to the function of so many enclosed room facilities. Mosques are among important infrastructure require good acoustic quality especially during Friday prayer where ‘khutbah’ is performed. Equally important is during ‘kuliah’ in order to have an intelligible speech among the congregations area. It is essential that architects should consider the acoustical properties of any enclosed room early in the design process. In practice, acoustics engineer, architects and interior design should be brought into the design team from the start preferably as early as the designing phase. It is to ensure that acoustics quality and sound reinforcement are included in infrastructure planning
