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Measuring Mixing Time in Non-Sabinian Rooms: How Scattering Influences Small-Room Responses

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The goal of this work is to optimize a DSP tool for extrapolating from room impulse response information regarding the way in which the transition between early reflections and late reverberation occurs. Two different methods for measuring this transition (usually referred as mixing time, tmix) have been found in literature, both based on statistical properties of acoustic spaces. Appropriate changes have been implemented and the algorithms have been tested on I.R. measured in 8 different environments. Particular attention is given to non-Sabinian environments such as small-rooms for music. It has been also measured a relationship between sound diffusion and tmix, showing how the presence of scattering elements contributes to lower tmix altering the statistical properties of I.R.

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