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Unsigned error in elevation (left) and in azimuth (right) as a function of the encoding, all target positions combined. Mean unsigned errors (in degree) before (non-surrounded) and after (surrounded) are depicted separately for the Monotonic group (squares) and Harmonic group (circles) and for the three visual-to-auditory encodings: the Noise (blue), the Monotonic (orange) and the Harmonic (red) encodings. Error bars show standard error of the unsigned error.
