1. A method for simplifying a model of an acoustic environment, wherein said model comprises a set of transfer functions, each transfer function corresponding to the sound propagation from a sound emitting position to a sound receiving position in said acoustic environment, the method comprising, for each transfer function, the steps of: calculating a first simulated reverberation of a first stimulus emitted at said sound emitting position as received at said sound receiving position by applying said transfer function to said first stimulus; selecting a subset of a set of local maxima in a first intensity envelope of the first simulated reverberation; and calculating a simplified transfer function which, applied to said first stimulus, provides a second simulated reverberation with a second intensity envelope matching said selected subset of local maxima of the first simulated reverberation.