# 5 // PJ Harvey Window (2006)
A piezo-element is a small metalplate with a crystallic or ceramic surface. They are for instance used as speakers in small electronic devices. To use as speakers, simply connect the plus to the crystal/ceramic surface, and the minus to the metal. Connect the piezo-elements to an amplifier. Attach the piezo-elements to the glass of a window. Connect a cd-player to the amplifier and play The slow drug by PJ Harvey. The slow drug has a nice title, the song is sensitive and sounds a bit like rain. The vibrations of the piezo-elements are reinforced by the glass, and the glass starts to sing. The sound produced is fragile, transparent and hard.