A biofeedback system that utilizes isochronic tone technology to augment EEG feedback by providing to a subject isochronic tones at the frequency of a targeted aspect of a subject's brain waves, such as the brain's naturally occurring peak energy in the particular EEG band or bands subject to the biofeedback. Isochronic tones are regular beats of a single tone that are formed by separate pulses of sound and silence. In addition, feedback can be provided to the subject in the form of pulsed light and pulsed tactile impulses that are delivered in the form of alternating presence and absence of light or tactile pressure.