important fact of which we got aware of during the project was that children
and adults don’t brush their teeth the same way, which forced us
to think differently for children. The idea of iBrush is that the rhythm
of the music should change according to the user’s brushing tempo.
We also thought about changing the octave depending on which side (left
or right) the user is brushing. But after having observed the children
we realized that this was too difficult and unlogical for them. We
kept the thought of changing from one octave to another, but instead of
having different octaves for the left and the right teeth, we associated
different octaves for the upper and the lower teeth.
start the music playback, there is an RFID tag in the lid of the toothpaste
tube. This has to be brought into the sending range of the antenna (built
into the toothbrush) each time the user starts brushing the teeth, as
well as wich each music genre change. As the sending range of the antenna
is limited, this can possibly introduce an additional, explicit interaction
step. A longer antenna range or a bigger RFID tag would of course solve
this problem, but the physical size of the toothbrush and the toothpaste
tube as well as the power consumption of the RFID reader set limits that
are difficult to break.