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Acoustic Positioning and Head Tracking Based on Binaural Signals

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Tracking a user's movement and orientation is essential for providing realistic mobile augmented reality audio (MARA) services. For mobile use the tracking system needs to be light-weight, wearable and wireless. Binaural microphones offer a convenient and practical solution for tracking user movement and orientation. These sensors can be easily integrated with portable headphones. In addition to tracking, the microphones also offer several possibilities to control the user's acoustic environment. This paper reviews the latest results in binaural head tracking with known anchor sources and also discusses the case where there are no known anchor (reference) sources available. Some transducer issues are also discussed.

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