The secret lives of invisible magnetic fields are revealed as chaotic, ever-changing geometries. All action takes place around NASA’s Space Sciences Laboratory, UC Berkeley, to recordings of space scientists describing their discoveries. Actual VLF audio recordings control the evolution of the fields as they delve into our inaudible surroundings, revealing recurrent ‘whistlers’ produced by fleeting electrons. Are we observing a series of scientific experiments, the universe in flux, or a documentary of a fictional world?
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What you are hearing are electro-magnetic waves of audio frequencies – not acoustical vibrations – transduced by loop antennas and amplified and applied to a loudspeaker to make them audible to humans. These wave resosnate (Schumann Resonance) between the earth’s surface and the ionosphere, which form a spherical resonant shell. The waves themselves can be triggered by lightning, high energy particles from the sun, cosmic rays, etc … And yes, the noises are chaotic, except for some ELF Radio Waves for submarine communication ….
Link:
http://en.wikipedia.org/wiki/Schumann_resonance
Another:
http://www.vlf.it/Schumann/schumann.htm
Thanks, Uncle Dave!
Video from the Japanese Solar Mission Hinode of the Sun’s magnetic field. Running time 01:41