The Bismarck Tribune provides a rundown of some of the most popular sounds and why they work to put you to sleep.
Mother nature has proven effective in gently lulling people to sleep with the sounds of falling rain, thunderstorms, or trickling creeks. The thought is that natural sounds are less likely to annoy us because the sounds are not necessarily repetitive. They fluctuate in both frequency and amplitude. Dr. Praveen Jinnur, who works in sleep medicine at Essentia Health in Fargo, says nature sounds can be effective because they drown out other more distracting sounds like household noises.