Sky Ear, by artist Usman Haque, involves launching 1000 helium balloons in the sky. As these balloons are sensitive to the environment, the red, blue and yellow lights inside them changes colour and intensity according to the amount of electromagnetic radiation nearby (see how it works.)

The audience will be able to change the ambient radiation and thus the colours by making calls using their mobile phones to mobiles contained within the cloud of balloons.

Sky Ear will take off on July 4 at the Belluard Bollwerk Festival 2004 in Fribourg, Switzerland, and on September 15 at the National Maritime Museum, Greenwich Park, London.

From Coin-operated.
Related entry: Electromagnetic sky.