Augmenting Touch Interaction Through Acoustic Sensing
Pedro Lopes, Ricardo Jota, Joaquim Jorge
[Published at ACM ITS 2011, Kobe, Japan]

Recognizing how a person actually touches a surface has
generated a strong interest within the interactive surfaces community. Although we agree that touch is the main source of information, unless other cues are accounted for, user intention might not be accurately recognized. We propose to expand the expressiveness of touch interfaces by augmenting touch with acoustic sensing. In our vision, users can naturally express different actions by touching the surface with different body parts, such as fingers, knuckles, fingernails, punches, and so forth - not always distinguishable by touch technologies but recognized by acoustic sensing. Our contribution is the integration of touch and sound to expand the input language of surface interaction.

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