Hemi-Sync

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Hemi-Sync is a trademarked brand name for a process developed at the Monroe Institute, used to create audio patterns containing binaural beats, which are commercialized in the form of audio CDs. Other companies have also created and marketed products based on the concept of binaural beats such as Holosync by the Centerpointe Institute.

Hemi-sync is a technology developed by Robert Monroe, founder of the Monroe Institute. Hemi-sync is short for Hemispheric Synchronization aka Brainwave synchronization. Monroe claimed that the technique synchronizes the two hemispheres of one's brain, thereby creating a 'frequency-following response' designed to evoke certain effects. Hemi-sync can allegedly be used for many purposes, including relaxation and sleep induction, learning and memory aids, helping those with physical and mental difficulties, and reaching altered states of consciousness through the use of sound.

The technique involves using sound waves to entrain brain waves. Wearing headphones, Monroe claimed that brains respond by producing a third sound (called binaural beats) that he believed to encourage various brainwave activity. ^[1]