Fixation of eye gaze toward one or more specific positions or regions of visual space is a desirable feature within several types of high-stress human interfaces, including vehicular operation, flight deck control, target acquisition, etc. It is therefore desirable to have a means to give spatial auditory feedback to a human in such a system about whether or not the gaze is specifically directed towards a desired position. Alternatively, it is desirable to use eye position as a means of controlling a device that provides auditory feedback so that there is a correspondence between eye position and control voltages that manipulate aspects of an auditory cue that includes spatial position, pitch and/or timbre.
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