Auditory stimuli, specifically those created through the presentation of two tones with slightly differing frequencies, can induce particular brainwave states. When a person listens to these carefully calibrated tones, one in each ear, the brain perceives a unified tone at the difference between the two frequencies. As an example, tones of 404 Hz and 400 Hz presented separately to each ear will be processed by the brain as a 4 Hz signal.
These auditory beat frequencies, particularly those in the delta range, are often associated with relaxation, deep sleep, and meditation. Historically, these techniques have been explored for their potential to influence cognitive states and promote overall well-being. The use of these is predicated on the theory that entraining brainwaves to specific frequencies may facilitate desired mental states.
