Realization of highly realistic auralization or telecommunication necessitates accurate reproduction of sound field or auditory space. Binaural reproduction/synthesis is one of promising ways to present spatial auditory space to a listener. Generally, binaural signals can be reproduced by using a set of headphones or some loudspeakers. The latter one, binaural presentation using loudspeakers, can be realized with appropriate crosstalk cancellation, or an inverse system, to eliminate unwanted sound transmissions. However, because the inverse filters for crosstalk cancellation vary with listener's position and orientation, conventional binaural presentation using loudspeakers forces a listener to be still while listening, thereby resulting in a quite small sweet spot and unnatural listening experience. This paper introduces binaural presentation employing dynamic crosstalk cancellation using head tracking and real-time filter generation, which leads to loudspeaker-based binaural reproduction without restrictions on listener's position and movement. The developed system is validated from acoustical and perceptual viewpoints. Furthermore, some loudspeaker configurations (position/number) are examined to find out an optimal one for dynamic crosstalk cancellation. The measurement and experimental results showed that the dynamic crosstalk cancellation works well for presentation of binaural signals; four loudspeakers would be sufficient to provide reasonable localization performance.
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