Analysis and Synthesis of Room Reverberation Based on a Statistical Time-Frequency Model
Jean-Marc M. Jot, Laurent Cerveau, Olivier Warusfel · 1997
This paper reviews a statistical time-frequency model of late reverberation decays, and describes an associated analysis procedure for deriving the time-frequency envelope of the reverberation from a measured impulse response, based on the notion of "Energy Decay Relief". The models and techniques discussed are applied to the representation of room acoustical quality, the characterization and equalization of transducers in diffuse fields, the restoration (denoising) of measured room impulse responses, as well as artificial reverberation and distance effects in virtual auditory displays and audio mixing systems. - 0 Introduction A stochastic model of room responses was proposed by Schroeder in the 1950s and further developed more recently by Polack [1-3]. This model is reviewed in the first section of this paper and applies to late diffuse reverberation decays, which will be the main concern of this paper. Statistical models bear a particular importance for auralization and syntheti...