A project designed by Edwin Van Der Heide (Netherlands)
Sound Modulated Light #1 is an environment of light and sound wherein sound is not present acoustically, but is radiated by light. Normal lamps connected to the electricity network flicker at an (almost) invisible frequency of 50 Hz. The latter can be seen as a carrier for a (rectified) 50 Hz sound. For the installation this signal is being replaced by different composed signals. Hence the lights function as sound carriers. The space consists of a multiple-light design where every light source has a double role: it is part of the light design and part of the sound design. The sound is modulated on top of the light by means of intensity modulation.
[read more @ evdh.net]