Binaural beats were originally discovered in 1839 by physicist Heinrich Wilhelm Dove. He discovered when signals of two different frequencies are presented separately, one to each ear, your brain detects the phase variation between the frequencies and tries to reconcile that difference.
In doing so, as the two frequencies mesh in and out of phase, your brain creates its own third signal — called a binaural beat — which is equal to the difference between those two frequencies.
Research has shown that introducing a binaural beat will cause the brain to begin resonating in tune with that beat. This technique can be used to quickly and easily guide your mind into a desired state.
The concept that music can change your mood is, of course, nothing new. I am unsure if binaural beats offer an improvement over typical music, placebo or otherwise. More conclusive studies are required, but if you do find you enjoy the beats, there are many free options available so you won't have to pay for the service.
And if you find you want to make your own binaural beats, check out:
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Share your experiences with Binaural Beats below, we'd love to hear them.