Subjective evaluations in virtual environments

The subjective perception of 3D sound distribution in rooms is still not completely analysed and fully evaluated, even if several experiments were conducted in the last ten years in this specific field. In this paper, the subjective evaluation of room acoustics perception have been analyzed by means or virtual reconstruction of 3D characteristics of ancient theatres, Italian-styled theatres and auditorium. The virtual acoustics of real enviromnents has been obtained both by means of Ambisonics based systems and by means of Stereo Dipole based systems, in the Arlecchino listening room at University of Bologna. The realisation of the properly measured filters will be discussed, and the preliminary results obtained gathering several questionnaires about subjective perception will be shown. Afterwards, the most relevant results about the correlation between subjective evaluation and measured, physical parameters, are illustrated.