A Reliable Non-Verbal Vocal Input Metaphor for Clicking

Daniel Zielasko, Neha Neha, Benjamin Weyers, Torsten Wolfgang Kuhlen
Proceedings of the IEEE Symposium on 3D User Interaction (3DUI) 2017

We extended BlowClick, a NVVI metaphor for clicking, by adding machine learning methods to more reliably classify blowing events. We found a support vector machine with Gaussian kernel performing the best with at least the same latency and more precision than before. Furthermore, we added acoustic feedback to the NVVI trigger, which increases the user's confidence. With this extended technique we conducted a user study with 33 participants and could confirm that it is possible to use NVVI as a reliable trigger as part of a hands-free point-and-click interface.

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