Acoustics of the Ketchaoua Mosque in Algeria

ALESHKIN, V.M.; Bouttout, Abdelouahab; Subbotkin, A. O.; Benferhat, M. L.; Amara, M.

doi:10.1134/s1063771021030015

Cited by 5 publications

(1 citation statement)

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“…The comparison of reverberation time measured in the three Algerian mosques discussed in this paper with those pertaining to other Ottoman masjids in the world (especially located in Turkey), 7,12,19,[44][45][46][47][48] showed that the first were in good agreement with the general trend as a function of room volume (Figure 13(a)), with the notable exception of Safir, where reverberation was actually very short also compared to many similar buildings. The Algerian Ottoman masjid Ketchaoua 44 that was recently restored (and for this reason not included in the present analysis), although having a similar volume than Jedid masjid (11,000 m 3 ), had an even shorter T 20 equal to 2.79 s, compared to the 3.18 s measured in Jedid masjid. The trend of unoccupied reverberation times follows a power law as a function of volume, with significantly high regression coefficient, coherently with behavior observed in other worship buildings like Catholic and Orthodox churches.…”

Section: Discussionmentioning

confidence: 99%

Acoustical characterization of three Ottoman masjids built in Algeria

Benferhat

Benzagouta

Bouttout³

et al. 2022

Building Acoustics

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This paper aims at evaluating the acoustical quality of historical Ottoman masjids in Algeria. Measurements were carried out according to current international standards, allowing calculation of acoustical parameters including reverberation time, speech transmission index and Clarity. Three Ottoman masjids located in Algiers (Jedid, Ali-Bitchin, and Safir) were selected. The main purpose of the study was to evaluate the acoustics of the prayer hall in relation to its worship use, assuming as a reference studies of existing masjids. Results showed that two of three worship spaces are generally reverberant under unoccupied conditions (with mid frequency reverberation times of about 3 s), while the other has reverberation time of about 1 s at medium frequencies. Speech intelligibility under unoccupied conditions is between poor and fair for Jedid and Ali-Bitchin masjids, while in Safir masjid values were generally above 0.6. Presence of architectural elements made C50 values quite scattered and characterized by a clear non-symmetrical distribution. Calculations to consider the effect of occupancy were also performed, resulting in significantly drier acoustics with improved clarity.

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