Abstract
In Hispania (present-day Spain and Portugal), there are 25 structures documented of classical Roman open-air theatres, of which 10 are in the south, in the Roman Baetica (Andalusia). The Baetica embraced the progress of urbanisation in the time of the Roman emperor Augustus, where theatres, built in stone, were the foci of entertainment, performance, and propaganda of the empire. The Roman theatre in Malaga presents the archaeological remains of the main vestige of the Roman Malaca. It is located in the historical centre of the city, at the foot of the hill of the Muslim Alcazaba and was discovered in 1952. It is a medium-sized theatre whose design corresponds to a mixed construction that combines making use of the hillside for the terraces, in the manner of Greek theatres, with a major construction where rock is non-existent, thereby creating the necessary space for the stands. In this paper, the production process, adjustment, and validation of the 3D model of the theatre are analysed for the creation of a numerical predictive model of its sound field. Acoustic properties of the venue are examined and the effect of the Muslim Alcazaba and the hillside on the various acoustic descriptors is analysed. The results highlight the influence of this large stone surface mainly on the time decay parameters.
Highlights
Ancient theatres form part of the acoustic and cultural heritage disseminated mostly in coastal countries along the Mediterranean shore and in other regions in the major cities of the ancient world of Europe, the Middle East, Northern Africa, and beyond
In addition to the long-term interest by historians and archaeologists, increasing attention has been paid to the acoustic properties of ancient theatres in the last decade [2]
Directional monaural parameters JLF and LJ are obtained with a figure-of-eight pattern microphone, and the inter-aural cross-correlation coefficient (IACCE) is calculated from binaural impulse responses measured through a dummy head
Summary
Ancient theatres form part of the acoustic and cultural heritage disseminated mostly in coastal countries along the Mediterranean shore and in other regions in the major cities of the ancient world of Europe, the Middle East, Northern Africa, and beyond. Several room acoustics simulation platforms based on beam-tracing have been applied to these ancient performance buildings for various purposes: in the study by Chourmouziadou and Kang [5], Raynoise software was used for the simulation with a hybrid algorithm that combined the image-source method and the beam-tracing method It considers both specular and diffuse reflections, as well as diffraction to research the evolution of the acoustic properties of classical theatres built in different eras from the viewpoint of the evolution of material and design. Aluusthiao(rCs’Cb-aBsYed4.0o)n. data from ign.es and other sites of the Governments of Spain and Andalusia (CC-BY 4.0)
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