The aim of this study is the evaluation of acoustic characteristics of the burial place in particular the Vigna Cassia’s catacombs in Syracuse. In late antiquity (III - VI cent. A.D.), the catacombs were the burial places of the Christian communities, but they were also places for prayer and sacred functions, celebrated especially for the presence of the tombs of the martyrs. The study of the acoustics of the catacombs was performed with the technique of the impulse response, some firecrackers were detonated in different areas of the catacombs and the answers were realized in function of the monaural parameters STI, T30, EDT, C80 and D50. The acoustic study was performed to define whether in such places, with complex geometries and interconnected tunnels, there are favorable conditions for speech understanding and for meditation and prayer.

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