Acoustics in coupled rooms: modelling and data analysis

• Autores: Ning Xiang, Jason E. Summers
• Localización: Proceedings of the ISRA 2007 Seville, Vol. 1, 2008 (Keynote Lectures), ISBN 9788469082676
• Idioma: inglés
• Enlaces
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• Resumen

  • Acoustical designers are increasingly incorporating coupled rooms in performing-arts spaces. Such designs include reverberant secondary rooms coupled to main audience chambers in concert halls and adaptation of opera houses and theatres for concert-hall use via adjustable orchestra shells that couple audience chambers to stage houses. These applications have prompted research on sound fields in coupled-room systems. Having developed an understanding of the possibilities and limitations of statistical-acoustics (SA) predictions, the validity of geometrical-acoustics (GA) modelling tools has been re-examined. Corrections and improvements are being incorporated into available GA algorithms. Numerical techniques using radiosity and diffusion theory have also emerged to cope with challenges in prediction of acoustics in coupled-room systems. For validation, physical scale-modelling techniques have become particularly relevant research tools. Despite all of these rapid developments, scientifically grounded analysis methods are still needed for objective and subjective evaluations of sound fields in coupled-room systems, whether in terms of numerical modelling, physical scale modelling, or real-hall measurements. After a brief review of modelling techniques, results are presented of Bayesian decay analysis in characterization of sound-energy decays obtained from numerical modelling and experimental measurements.