Measurements of sound scattering of the steps of the cavea in ancient open air theatres
- Autores: Andrea Farnetani, Nicola Prodi, Roberto Pompoli
- Localización: Proceedings of the ISRA 2007 Seville, Vol. 3, 2008 (Oral Session Communications), ISBN 9788469082676
- Idioma: español
- Enlaces
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Resumen
In previous works the acoustical behaviour of ancient Greek and Roman open air theatres was outlined by means of both in situ acoustical measurements and scale model studies. Moreover, a simplified phase image source model was developed to predict the sound level within ancient theatres. It was found that wave effects are not negligible in these spaces and the scattering of the steps was demonstrated to play an important role. The above findings prompted to further investigate the diffraction caused by the tiers of steps in open air ancient theatres, from the experimental and numerical point of view. Thus, a sample of ancient theatre´s cavea was modelled and its scattering and diffusion coefficients were measured both in a diffuse and a free sound field. The obtained scattering data are relevant in the contest of numerical ray tracing modelling of performance spaces and in particular of open air theatres where their impact seem of paramount importance.
