Head Tracking of Auditory, Visual, and Audio-Visual Targets

Frontiers in Neuroscience
Johahn LeungSimon Carlile

Abstract

The ability to actively follow a moving auditory target with our heads remains unexplored even though it is a common behavioral response. Previous studies of auditory motion perception have focused on the condition where the subjects are passive. The current study examined head tracking behavior to a moving auditory target along a horizontal 100° arc in the frontal hemisphere, with velocities ranging from 20 to 110°/s. By integrating high fidelity virtual auditory space with a high-speed visual presentation we compared tracking responses of auditory targets against visual-only and audio-visual "bisensory" stimuli. Three metrics were measured-onset, RMS, and gain error. The results showed that tracking accuracy (RMS error) varied linearly with target velocity, with a significantly higher rate in audition. Also, when the target moved faster than 80°/s, onset and RMS error were significantly worst in audition the other modalities while responses in the visual and bisensory conditions were statistically identical for all metrics measured. Lastly, audio-visual facilitation was not observed when tracking bisensory targets.

References

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Citations

Apr 21, 2016·Trends in Hearing·Simon Carlile, Johahn Leung
Aug 29, 2019·Journal of Neurophysiology·Nathaniel J Zuk, Bertrand Delgutte

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Software Mentioned

Matlab
Windows
Prism ( GraphPad )
Mathworks Matlab
RME Fireface
Matlab Mathworks )

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