# Influence of Reflections on Crosstalk Cancelled Playback of Binaural Sound Asbjørn Sæbø **Abstract:** This work has investigated how crosstalk cancelled loudspeaker reproduction of binaural sound intended for anechoic conditions is influenced by taking place under nonanechoic conditions. The scope has been limited to an investigation of the effect of early reflections on localisation for target directions in the horizontal plane. Crosstalk cancellation was implemented in software, with routines for the inversion of transfer functions, the design of crosstalk cancelling filters, filtering of sound and playback simulation. The system for crosstalk cancellation was found to give a realistic, natural and convincing reproduction of binaural signals. The effect of a single reflecting surface on a given setup for crosstalk cancelled loudspeaker playback was studied using a simplified model and playback simulation. It was found that the crosstalk cancelling filtering designed for the direct sound would not give crosstalk cancellation for the reflected sound, that the reflections in many cases were not geometrically plausible for a real source in the intended source directions, and that the interaural time difference for the reflections was nearly equal to that for a source placed at the reflecting surface. The effect of reflections delayed 5 ms and 10 ms with respect to the direct sound was investigated through listening tests. The playback setup was two Bowers & Wilkins 801 loudspeakers placed next to each other in front of the listener, at two meters distance, in an anechoic room. **Authors:** [[Binaural Sound]]