What are binaural beats and how do they work?
Binaural beats are an auditory phenomenon discovered by physicist Heinrich Wilhelm Dove in 1839. When two slightly different frequencies are presented to each ear through stereo headphones, the brain perceives a third "phantom" frequency equal to the mathematical difference.
Example: 400Hz in the left ear + 406Hz in the right = a perceived 6Hz theta beat generated in the superior olivary complex of the brainstem.
This triggers the Frequency Following Response (FFR) - where large neural populations synchronize their electrical discharge patterns to the external rhythm. Research by Jirakittayakorn & Wongsawat (2017) demonstrated significant increases in frontal theta power within just 10 minutes.PubMed