Research being presented at drupa by the Institute for Print and Media Technology at Chemnitz University of Technology, could make listeners prick up their ears. It is sound from loudspeakers printed on paper and which can be heard at the stand of printing press manufacturer Windmöller & Hölscher.
The researchers printed the speakers on standard paper using a flexo process and, like conventional speakers, they are connected to an audio amplifier.
“Frequency response and therefore sound quality are good, and the paper is surprisingly loud. Only the bass is a little weak,” explained Georg Schmidt, senior researcher on the team.
The researchers fabricated the thin loudspeakers from several layers of a conductive organic polymer plus a piezoactive layer. They are remarkably durable and can be manufactured at extremely low cost. What is more, coloured messages can be printed on them.