"White noise contains equal energy across all audible frequencies, while brown noise, also known as Brownian noise or red noise, has more energy at lower frequencies, making it sound deeper and less hissy," says Daniel Ganjian Opens a new window, M.D., a board-certified pediatrician at Providence Saint John's Health Center in Santa Monica, California. ![]() Brown noise has gotten a lot of buzz, too. White noise isn't the only noise "color" out there. Multiple studies suggest that white noise can reduce the time it takes to fall asleep and also help people stay asleep. White noise is "thought to facilitate sleep by masking other disruptive environmental noises," Dr. You're probably familiar on some level with white noise, but in case you need a refresher: "White noise refers to a consistent sound that contains all audible sound frequencies within the range of human hearing, which is played simultaneously at equal intensity," explains Cher Zhao Opens a new window, M.D., a pediatric otolaryngologist (ear, nose, and throat expert) at Mass Eye and Ear. Experts break down these claims – and what to do going forward for more peaceful nights. If your baby or toddler isn't sleeping through the night, you might also wonder if a white noise machine could be the culprit. "2.5 and never slept through the night until I turned it off. "FIVE YEARS … we tried this last night and she slept through the night," wrote one. Parents with similar experiences flooded the comment section. I've been blasting that in her ear for two years." "It has to be the white noise," she said. The result: Her daughter slept through the night four days in a row without the white noise machine on. ![]() ![]() "I thought we would try it for a couple of days," she said.
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