Many Italian Opera theatres have been already studied under acoustic perspective. The fast updates of the innovative technology on the market drive the authors to undertake a deep investigation of the acoustic behavior of the Goldoni theatre. In particular, the results obtained have been analyzed in order to present an overlay video of the impulse response (IR) besides the main acoustic parameters outlined by the standards. The utilization of a multichannel spherical array microphone allowed the realization of this supplementary investigation that give a clearer idea of the sound propagation in such space. This paper also deals with the description of the history and of the architectural features that that characterize the Goldoni theatre.

No abstract

The attention by the scholars to study the Italian Opera theatres should not be stopped to the acoustic characteristics by showing the graphs related to the parameters as required by standard regulations. The development of the technology allows the employment of specific equipment capable to explore the cultural heritage more deeply. The outcomes obtained by the acoustic survey undertaken inside the Valli theatre of Reggio Emilia have been analyzed in two ways: the first methodology shows the data in line with the standard requirements indicated by ISO 3382-1; the second methodology shows a real-time impulse response (IR) highlighting specific construction elements that contribute to generate early or late reflections. The utilization of a spherical array microphone allows a full control of the spatial propagation of the sound waves. The authors are delighted to also introduce a brief history of the Valli theatre of Reggio Emilia, including the description of the architectural features that characterize this important Opera house.

Within the frame of SIPARIO, a project recently funded by the Italian region Emilia Romagna, it aims to virtually reconstruct both 3D audio and 360° video of real performances by recording and undertaking acoustic measurements inside the most historical theatres and concert halls spread all over the Europe. One of the most relevant topics of this project consists of the acoustic implementation of a new prototype of loudspeaker that will be necessary to properly determine the acoustic characteristics of these performing arts places. This loudspeaker can be employed in 3 different ways: one of the added values compared to a standard loudspeaker would be the simulation of a dynamic directivity pattern of any type of sound source that would be found in a performing arts place. This paper deals with the explanation of the other 2 types of techniques that the aforementioned prototype loudspeaker is able to perform. The loudspeaker can work like a traditional omnidirectional sound source by feeding the Exponential Sine Sweep (ESS) signal to all the 32 drivers in order to measure the room impulse response (RIR). Furthermore, it could have a complete spatial control of the sound propagation through the Multiple Input Multiple Output (MIMO) approach, owing to the spherical array of 32 channels for both source and receiver. In this paper the mathematical framework of previous articles has been applied to extract the arbitrary directivity of virtual microphones from real microphone array and for a virtual reality source from the spherical speaker array. Moreover, future developments of the new sound source are briefly described, including the applications for the specific project.

No abstract