CMU student Chris Harrison has showed off an acoustic touch gesture recognition technique called scratch input. The idea is very intuitive. When you write something on a surface, it produces a unique acoustic wave (left figure). Therefore, with a microphone and carefully designed pattern recognition software, scratch input detects and recognizes simple touch gestures drawn on any solid surfaces and soft fabrics.
Stane is a similar research work done by researchers at Glasgow university.
I was going to take advantage of this phenomena by writing a composition for chalkboard consisting solely of letter sequences.
This is a way more pragmatic application.
What do you think about Tai-Chi project?(http://www.taichi.cf.ac.uk/). It seems to be more functional than ScratchInput.
And, if you have any work on acousint sensing, could you inform me of the URL of the work?
I wouldn't say Tai-Chi is more "functional", but it has some advantages in that they're trying to reconstruct absolute position rather than single gestures.
Sorry, I don't have any work to share on acoustics sensing -- it's all in my sketchbook :)
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