Diffuse Reverberation Model for Efficient Image-Source Simulation of Room Impulse Responses

Abstract-- In many research fields of engineering and acoustics, the image-source model represents one of the most popular tools for the simulation of sound fields in virtual reverberant environments. This can be seen as a result from the relative simplicity and flexibility of this particular method. However, the associated computational costs constitute a well known drawback of image-source implementations, as the required simulation times grow exponentially with the considered reflection order. This paper proposes a method that allows for a fast synthesis of room impulse responses according to the image-source technique. This is achieved by modeling the diffuse reverberation tail as decaying random noise, where the decay envelope for the considered acoustic environment is determined according to a recently proposed method for the prediction of energy decay curves in image-source simulations. The diffuse reverberation model presented in this paper thus produces impulse responses that ...

• Type: Journal
• Year: 2010
• Where: TASLP
• Authors: Eric A. Lehmann, Anders M. Johansson
• Keywords: Diffuse Reverberation, Room Impulse, Simulation, Software Engineering, TASLP 2010