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Adjustment of the direct-to-reverberant-energy-ratio to reach externalization within a binaural synthesis system

: Werner, Stephan; Klein, Florian; Sporer, Thomas

Mayo, M. ; Audio Engineering Society -AES-:
Audio for Virtual and Augmented Reality : Los Angeles, California, USA 30 September – 1 October 2016
Red Hook, NY: Curran, 2016
ISBN: 978-1-5108-4346-2
ISBN: 9781942220107
Paper 6-4
International Conference on Audio for Virtual and Augmented Reality <2016, Los Angeles/Calif.>
Fraunhofer IDMT ()

The contribution presents an experiment to use the room acoustic parameter Direct-to-Reverberant-Energy-Ratio (DRR) to solve the room divergence effect in binaural listening via headphones. Perceived externalization of auditory events is decreased if acoustic divergence between the listening room and the resynthesized room occurs. The DRR is used to push the synthesis towards the listening room to increase externalization. The listeners adjust the DRR of the synthesis on the expected DRR of the listening room until congruence between synthesis and listening room is perceived. The results show that the DRR is a suitable acoustic parameter. The listeners are able to reliably adjust the DRR of the listening room only by their expectations and no explicit external reference. A subsequent quality test shows that the congruent DRR conditions have only a minor effect on the increase of externalization using divergent room conditions.