Binaural beats are an auditory illusion created when two slightly different frequencies are played in each ear. The brain perceives a third tone, which is the difference between the two frequencies. For example, if one ear hears a tone at 300 Hz and the other at 310 Hz, the brain interprets a beat at 10 Hz. This phenomenon can influence brainwave activity and is often used for relaxation, meditation, and focus. Many people use binaural beats as a tool for stress reduction or to enhance cognitive performance. They are typically delivered through headphones to ensure each ear receives its specific frequency. While some studies suggest potential benefits, more research is needed to fully understand their effects.