Bluetooth Professional Quality Sleep Sound Therapy System with 20 Built-in Sounds Plus Pink Noise for Even Better Sleep. Proven to help you sleep, manage tinnitus, relax and renew naturally. Let 25 years of sleep research help you sleep better and feel healthier. Your brain responds to sounds that it hears. Sound Oasis plays back nature sounds, music and therapy sounds based on Delta, Alpha or Beta brainwaves that coax your brain to match these frequencies and enter healthy states of sleep or relaxation.