Here's a good website that addresses the frequency of the planet and how manmade frequencies are effecting our whole planet; it's good background info:
SCHUMANN RESONATORS
http://www.schumannresonator.com
Early Astronauts physical conditions deteriorated severely whilst in Outer Space, away from Schumann Resonance.
This problem was solved by introducing Schumann Simulators into all space shuttles, a magnetic pulse generator mimicking the Earths frequencies.
This shows the simple fact we cannot be healthy if we are disconnected from the "natural biological frequency."
In 1954 measurements confirmed the earth frequency of 7.83 Hz from there, investigators worldwide began to research and establish the connection between Schumann resonance and the rhythm of brain waves.
The earth had the same natural resonance as our human brain.
All appliances, TV's, computers, mobile phones, radios, digital devices, air conditioners, lighting, power / communication lines, air/radio waves produce damaging electromagnetic fields (EMFs), which we cannot see, but appears to us in the form of stress, headaches, sleeplessness, and moodswings, amongst other more chronic symptoms.
These frequencies interfere with our body‘s own electro magnetic operating system causing abnormal conditions, stress,and interupting links with our schumann resonance /tuning Fork and maintaining a healthy, happy life.
This site also offers devices to restore the proper frequency. I would like to see someone coming up with inventions that don't interfere in the first place though.