Effect of geometrical shape on the characteristics of sound diffusers in 1:50 scale model concert halls

• Autores: Jin Yong Jeon, Shin-ichi Sato
• Localización: Proceedings of the ISRA 2007 Seville, Vol. 3, 2008 (Oral Session Communications), ISBN 9788469082676
• Idioma: español
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• Resumen

  • This study investigates the optimum parameter settings in the computer models. Model fitting was carried out in terms of RT, EDT, C80, and Ts. Acoustical parameters calculated by ODEON program were compared with those measured in a 1:50 scale model of shoebox and fan-shaped halls. Wooden hemispheres were installed on the side walls of the scale model. The results of the computer simulation showed that a 30% reduction in the absorption coefficients from the reverberation chamber measurement gave the minimum error for flat surfaces while a 25% reduction for the hemisphere diffusers in terms of RT, EDT, C80, and Ts. We also investigated the effect of the transition order on the acoustical parameters; however, there was little difference between the transition order 0 and 1. There was no significant difference between shoebox and fan-shaped halls.