Around the Earth, there are roughly 2,000 lightning storms at any given period of time, producing around 50 flashes of lightning every second. Each lightning burst creates electromagnetic waves that begin to circle Earth in the cavity between Earth's surface and the ionosphere. Some of this electrical activity is in the form of standing waves. These waves, if they have just the right wavelength, combine and increase in strength to create a Schumann resonance.
This relaxing ambient music is tuned to A=432Hz and is embedded with 7.83Hz binaural beats, a range where theta and alpha brain waves intersect.
The earth has music for those who listen. -George Santayana
The Schumann resonances are constantly changing but the base atmospheric electromagnetic resonant frequency is 7.83Hz. The audible frequency range for the human ear is between 20Hz and 20,000Hz, so this song uses binaural beats to create an effect of hearing and feeling 7.83Hz.
In binaural beats, a different frequency is played each ear. Your brain interprets the two tones as a "beat" or frequency of its own. This is the difference in Hz between the two tones being played. In this song, I started with 7.83Hz then went four octaves higher to 125.28Hz (B note) and calculated the two sine waves around that average. This creates a much more harmonic feeling in my opinion.
Many studies also show that the Schumann resonances affect human consciousness. It has shown to affect melatonin, influencing biological functions such as circadian rhythms of life on earth.
Live Data on the Schumann levels Global Coherence Initiative