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The Schumann Resonannce is the frequency of the Earth's vibration. There are several frequencies involved but the predominent one is 7.83 Hz.
Other frequencies associated with the Schumann Resonannce include 13.8 Hz, 19.7 Hz, 25.7 Hz, 31.7 Hz, 39 Hz, and 45 Hz. The exact frequency varies over time. There is also evidence that the average frequencies are drifting over time as well.
7.83 Hz lies in the range of alpha brain waves. Therefore, listening to a binaural beats set at Schumann Resonnace will increase alpha brain waves.
Some of the meditation MP3 files available here on JetCityOrange employ binaural beats.