A binaural beat is an auditory illusion created by the brain when two different tones are played in each ear simultaneously, creating the perception of a third tone. Listening to binaural beats may help train the mind to increase creativity, enter a meditative state, reduce anxiety or improve mental focus.

A Turkish study published in the Journal of Integrative and Complementary Medicine investigated the effect of using binaural beats with patients undergoing a sedation-free upper gastrointestinal endoscopy. Forty-eight patients in the binaural beats group wore headphones and listened to music 15 minutes before the endoscopy, and the control group of 48 patients was given no pre-procedure treatment. The binaural beats group experienced significantly lower anxiety and better tolerated the endoscopy procedure than the control group.