In this paper, the acoustics of multi-purpose colonial theaters in Algeria, those of Algiers and Bejaia, are studied to evaluate their acoustic conditions (suitability for music and speech) in view of their architecture’s evolution. To do, acoustics measurements were performed inside them according to the ISO 3382-1 Standard in unoccupied conditions. The average values of acoustic parameters (EDT, T30, C80, and D50) are reported in frequency domain from 125 to 4 kHz. Furthermore, maps of spatial distribution of T30, C80 at the frequency of 1 kHz, and STI are reported. Results show that the Algiers theater is the more appropriate venue for multipurpose performances (with a fairly low RT of 1.5 s in average mid-frequencies), whereas the Bejaia theater is only suitable for musical performances (with a high RT of 2.5 s in average mid-frequencies).
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