We have evaluated the use and accuracy of using gaze captured by a head-mounted eye tracker in acoustic source localization experiments. The results can be found in a recent paper presented at the 38th International Conference on Sound Quality Evaluation of the Audio Engineering Society. The following video shows a snapshot of the conducted experiments as seen from the helmet camera of the eye tracker
Seven loudspeakers at known positions are located behind the acoustically transparent gray curtain. The stimulus is played from a random loudspeaker and the subject is asked to fixate the perceived position of the stimuli. The gaze is tracked by the eye-tracker and shown as overlay in the video. The subjects were additionally asked to point to the perceived source position using a laser pointer. The pointer is also visible in the video. The details of the experiment can be found in the paper.