Ten minutes of nature sounds therapy is like nature's lullaby, with lasting effects throughout the day. A tempo of 60-72 beats per minute imitates the rhythm of a heart beating, creating a hypnotic state and inducing sleep. Acoustic guitar, harp, flute, piano, etc., combine with the music of nature to block out disturbing sounds, triggering responses from the brain that reduce stress, lower blood pressure, and promote good health.