Modelling of reverberation enhancement systems

Jeremy Rouch , Isabelle Schmich (1) , Marie-Annick Galland (2)

1 CSTB - Centre Scientifique et Technique du Bâtiment
2 LMFA - Laboratoire de Mecanique des Fluides et d'Acoustique

Electroacoustic enhancement systems are increasingly specified by acoustic consultants to address the requests for a multi-purpose use of performance halls. However, there is still a lack of simple models to predict the effect induced by these systems on the acoustic field. Two models are introduced to establish the impulse responses of a room equipped with a reverberation enhancement system. These models are based on passive impulse responses according to the modified theory of Barron & Lee or to the diffuse stochastic fields approach introduced by Polack. The action of the system is simulated either with an energetic approach derived from Sabine’s theory or by solving the frequency equation governing a multivariable loop system (FMLSE). The acoustic criteria derived from these models are compared with those obtained with a reference method. This method is based on the numerical calculation of impulse responses by asymptotic methods (ICARE software developed at CSTB) and the resolution of the FMLSE.

Domaines: Acoustique [physics.class-ph]

Jeremy Rouch, Isabelle Schmich, Marie-Annick Galland. Modelling of reverberation enhancement systems. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811163⟩