A hovering object that explores and manipulates transitional public spaces with particular acoustic properties. By constantly recording and replaying these ambient sounds, the hovering sphere produces a delayed echo of human activity.
Space replay responds sonically to people and its surroundings by means of a battery-powered Arduino, a Wave Shield hacked to record and playback audio and a small speaker. These were inserted into the balloon after being vacuum formed in the shape of a cone, in order to enhance the sound coming from the speaker.
The balloon was filled with enough helium to be able to lift everything and hover, reaching neutral buoyancy. The final prototype weights 120g, comprising of electronics, packaging and balloon.
from: Francesco Tacchini