20Hz by Semiconductor

20 Hz from Semiconductor on Vimeo.

20 Hz is a 5 minute video which uses data collected by the CARISMA radio array. CARISMA (Canadian Array for Realtime Investigations of Magnetic Activity) is an array of magnetometers which study the Earth’s magnetosphere. 20 Hz is an interpretation of a magnetic storm occurring in the Earth’s upper atmosphere. The CARISMA data – captured at the frequency of 20 Hertz – is interpreted as audio, allowing us to hear the “tweets” and “rumbles” caused by the interaction of solar wind with the Earth’s magnetosphere. The visual element of the film is generated directly by the sound. Tangible and sculptural forms emerge suggestive of scientific visualisations. As different frequencies interact both visually and aurally, complex patterns emerge to create interference phenomena that probe the limits of our perception.