Sound tracks that coax your mind into an optimal state for deeper, more restorative sleep all night long. These 8 Hour Long tracks from Dr. Jeffrey Thompson are scientifically composed sound tracks that coax your mind into an optimal state for deeper, more restorative sleep all night long. There are four main categories for you to enjoy: Ocean - beautiful, rhythmic ocean sounds Celestial - calming, floating sounds of outer space Nature - relaxing sounds of nature Musical - soothing, dreamy music Dr. Thompson is recognized as one of the world's leading experts in sound therapy. He has created over 60 CDs which are sold in 26 countries and is a consummate musician and composer in his own right. Dr. Thompson has appeared on Fox Evening News, CNN, Time/Life, various radio programs and quoted in the Wall Street Journal, Washington Post, San Diego Magazine and Psychology Today.