20hz is a work by Ruth Jarman and Joe Gerhardt, based on audio data provided by CARISMA, operated by the University of Alberta, funded by the Canadian Space Agency, and commissioned for the Invisible Fields Exhibition at Arts Santa Monica, Barcelona. 2011-2012.

20Hz is based on a geo-magnetic storm occurring in the Earth’s upper atmosphere. Working with data collected from the CARISMA radio array and interpreted as audio, you can hear static, chirps and rumbles caused by incoming solar wind, all captured at the frequency of 20 Hertz.

The visual forms and visualizations are all generated by the sound.

As different frequencies interact both visually and aurally, complex patterns emerge to create interference phenomena that probe the limits of our perception

See some of the stunning screen captures here (click to enlarge):

The result is very relaxing, very interesting from a sonic point of view, and the visualizations seem to complement the sound perfectly. Check out the video/sound below: