Measurements of acoustical parameters in the roman theatre of Verona

The attention of the scholars to the acoustics of ancient open-air theatres has increased considerably through the centuries. Among the historical buildings survived to nowadays the acoustics of the Roman theatre of Verona has not been deeply in-vestigated, yet. In this paper, the outcomes of the acoustic survey have been compared with the values measured by research-ers in the Roman theatres of Benevento and Seville. However, the post-processing data obtained inside the theatre of Verona have been analysed in two different ways: by a standard methodology representing the graphs of the acoustic parameters, and by the creation of a video showing a real-time impulse response (IR) and relative reflections occurred at the boundaries of the construction. The latest technique has been realised by using a multichannel spherical microphone array, which calls back the MIMO approach that is capable to have complete spatial control of the sound propagation through space. The authors of this paper illustrate a brief history of the theatre, including the description of the construction elements, and also two distinct procedures in showing the results that strengthen the necessity of using the MIMO approach beside the traditional graphs capable to detect the directionality of sound reflections and to estimate the intensity of scattering.