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Optimization of Binaural Room Scanning (BRS): Considering inter-individual HRTF-characteristics

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The headphone-based Binaural Room Scanning (BRS) auralisation system relies on real-measured binaural room responses by means of a dummy head. Convoluting the measured binaural room responses with the input signals by means of the BRS Processor and reproducing the resulting signals by headphones, a virtual representation of the scanned room situation is achieved. Taking into account spontaneous head movements by means of head-tracking typical dummy head, artefacts like front/back inversions are efficiently suppressed. The main applications of the BRS-system are the virtual representation of stereo or multi-channel control rooms to realise optimal virtual conditions in real inadequate conditions. In the evaluation experiments during the development phase of the system, artefacts from the processing caused by necessary simplifications could be eliminated. Thus the quality of the system preliminary depends on human cues, that means individual HRTF regarding room scanning as well as headphone reproduction. An optimisation of the BRS system with specific respect to the inter-individual HRTF differences is investigated.

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