Swedes make talking paper breakthrough

Mikael Gulliksson, a researcher at Mid Sweden University said the technology could be used to make billboards talk.

Paper surfaces of the two meter high billboards respond to peoples' touch by playing clips from music albums, or spoken dialogue.

The whole lot is made out of paper and ink which is connected to a power supply.

Speakers are made by printing electromagnets out of conductive ink and stretching the paper over a cavity like a speaker cone.

The electromagnets vibrate in response to a current, creating a sound.

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