UIST2.0 Archive - 20 years of UIST
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In Proceedings of UIST 2007
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Blui: low-cost localized blowable user interfaces (p. 217-220)

Abstract plus

We describe a unique form of hands-free interaction that can be implemented on most commodity computing platforms. Our approach supports blowing at a laptop or computer screen to directly control certain interactive applications. Localization estimates are produced in real-time to determine where on the screen the person is blowing. Our approach relies solely on a single microphone, such as those already embedded in a standard laptop or one placed near a computer monitor, which makes our approach very cost-effective and easy-to-deploy. We show example interaction techniques that leverage this approach.