_Influence of Proportion Towards Speech Intelligibility in Mosque’s Praying Hall

This research is to measure the speech intelligibility on few samples of praying halls of different configurations and the influence of design, size and proportion on the overall acoustics performance. The speech intelligibility levels were measured using 01 dB Dual Channel Real Time Frequency Analyser Type Symphonie, and analysed using acoustics software to give the RASTI values. The RT of the sound source was determined using dBBati32. Results of the study confirmed that the proportion of the praying halls does influence the level of speech intelligibility, and very much related to the RT of the space.