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Gaze as a Measure of Sound Source Localization

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We present a study on utilizing eye movements for acoustic source localization tests. Test subjects had to indicate the presumed location of a hidden sound source with their head unconstrained by either fixating or additionally pointing with a laser pointer. Stimuli varied only in the horizontal plane from +45° (left) to -45° (right). Fixation error was always smaller than error in pointing and remained constant for all source positions, whereas pointing error showed a clear relation to source position with more eccentric positions leading to a higher error. Based on these results we conclude that gaze constitutes a useful measure for sound localization tests.

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