Diane Hamilton: Zen, Meditation, and Development

The science behind brainwave entrainment goes back further than most people assume. In 1839, a German physicist named Heinrich Wilhelm Dove noticed something odd about how the human ear and brain respond to sound. He found that when two slightly different frequencies are played, one in each ear, the perceptual system registers a third beat that exists nowhere in the actual audio. It is produced entirely inside the listener.

Dove was not a fringe figure. He held a fellowship with the Royal Society, worked as a physicist, and ran the Prussian Meteorological Institute. His observation sat largely unexplored for over a century before anyone turned it into a usable audio method.

That practical development came between the 1950s and the 1970s, when various researchers and companies began engineering the effect into recordings. Several parties have since claimed credit for the technology, but the original discovery of the effect itself traces back to Dove.

The appeal, for people interested in meditation and mindfulness, is the idea that the right auditory stimulus can nudge brain activity toward a calmer, more settled state. Whether and how well this works is a question with a research trail attached. Searching PubMed for published studies on mindfulness and the psychological effects of brainwave entrainment will show what has actually been examined.

A standard caution applies to any of this. These statements have not been reviewed or approved by the FDA, and nothing here is meant to diagnose or treat disease.