In order to meet the legal requirements, we give the following reference: The magnetic field therapy is scientifically disputed and by the conventional medicine it is not recognized.
Schumann waves
At about 100 kilometres above the surface, the earth is surrounded by the ionosphere. The vast space between the ionosphere and the earth´s surface acts as an enormous electromagnetic resonance cavity, like the sound box of a musical instrument. These resonating electromagnetic waves are known as Schumann waves, after their discoverer, the physicist W.O. Schumann.
The basic waveform (first harmonic) has a frequency of 7,8 Hz. Exactly the same frequency is present in the main control centre of the human brain, the Hippocampus / Hypothalamus; i.e. the region of our brain which is important for attentiveness and concentration.