Touch sensitive blackboard

Touch sensitive surface using a single sensor only. In general one needs as many sensors as dimensions for positioning, e.g. GPS needs at least 4 satellites to find the 3D position + time. Here 2D positioning is done using only a single sensor - a simple PC microphone.
This video is based on a project done at the Group for Digital Signal Processing and Image Analysis, http://www.ifi.uio.no/research/groups/dsb/, Department of Informatics, University of Oslo in the course INF3460 - Project in acoustics and signal processing, http://www.uio.no/studier/emner/matnat/ifi/INF3460/index-eng.xml

Category:

Science & Technology

Tags:

• acoustic
• recognition
• sensitive
• object
• INF3460
• University
• of
• Oslo
• universitetet

[c0mpumast3r]

Excellent! May I know how was the recorded audio analyzed?were you using the Goertzel algorithm or were you using other algorithms to analyze the tones?

[svholm]

We used a template match algorithm based on the correlation function.

[c0mpumast3r]

@svholm ah ok thanks! Im gonna have a look about this algorithm too!

[LHGH4x0r]

i have those in all my classes

[athr0x]

det hadde jo vært en fordel å trene systemet korrekt (= men flott konsept