Author: John Usher, Audio Group, Barcelona Media – Innovation Centre.

Journal: Journal of the Acoustical Society of America

Abstract: Determining the onset time of reflections in an acoustic impulse response (IR) has ap-plications for both subjective and physical acoustics problems. Although computationally simple, a first-order energetic analysis of the IR can lead to false-positive identification of reflections. This letter reports on a new method to determine reflection onset timings using a modified running local kurtosis analysis to identify regions in the IR where the distribution is non-normal. IRs from both real and virtual rooms are used to validate the new method and to find optimum analysis window sizes