wave_scan, by Brad Todd, is composed of an ELF (extremely low frequency) sensor, an antenna and a projection of a video database of water filmed over the past 15 years in different countries.

The system is centred around the ELF sensor. In paranormal research these electric and magnetic fields are also monitored by people searching for ghosts and other inexplicable phenomena: "cold spots" and other signs of paranormal activity reported by persons who think they are seeing phantoms are in fact closely tied to these EMF fields.

The ELF sensor is attached to an old TV antenna and is transmitting to a computer. Any detection of weak fluctuations of frequencies near the antenna results in the direct manipulation of a soundscape which is generated using a sine wave and white noise to create synthetic oceanic sounds. Any readings are also translated as clicks and pops, thereby creating a minimialist audio environment which gives audible evidence of a "presence" in the space.

Besides, the image slowly works itself from full chroma to blank, depending on the number of "hits" in the space. This sense of effacing the work and rendering the image into a ghostly and finally invisible screen closes a circuit or cycle of the works "life", in an allegorical mapping of our anxiety concerning the unseen or liminal...