Perfect for any mental task requiring focus and concentration – use at home, work or school while studying, reading, working on a computer or balancing a checkbook. Play in the background or use with headphones to enhance mental capabilities while stimulating creativity and imagination. (Mind Food – Non-verbal) 58 min. Learn more about Hemi-Sync, and get your FAQ answered. Learn more about Hemi-Sync creator Robert Monroe. Do not listen to Hemi-Sync while driving or operating heavy equipment, or with other devices that may influence brainwave activity. If you have a tendency towards seizures, auditory disorders, or adverse mental condition(s), do not listen to Hemi-Sync without first consulting your physician. Do not use Hemi-Sync with Dolby or other noise-reduction systems, as doing so will diminish the effectiveness of the Hemi-Sync signals.