Falling asleep to the gentle hum of white noise might seem like a good idea, but a brain doctor warns it could actually cause problems later on, especially if you make one big mistake. This expert, Dr. Baibing Chen (known as Dr. Bing online), suggests that trying to sleep better with loud white noise could raise your risk of getting dementia in the future. He personally avoids three things before bed, and making white noise too loud is one of them. Hidden Danger of Loud White Noise Dr. Bing explains that many people use white noise machines to block out annoying sounds like traffic, a partner's snoring, or even a dog licking its paw in the middle of the night. But he warns that if the machine is too loud, it can slowly damage your hearing. He highlights that losing your hearing is one of the biggest risk factors for dementia when you get older. While there's no strong proof that white noise itself directly causes dementia, some studies do suggest that being exposed to a lot of noise over time, including very loud white noise, might be linked to a higher chance of developing dementia. What Exactly Is White Noise and Does It Help You Sleep? The Sleep Foundation describes white noise as a type of "broadband noise" that includes all sounds our ears can hear. Think of the static hiss from an untuned radio or the gentle hum of a fan – these are common examples of white noise. Studies on whether white noise actually helps you sleep have shown mixed results. Some research found that white noise helped newborn babies fall asleep faster, and also helped adults living in noisy parts of New York City drift off more quickly and get better sleep. However, in some cases, white noise actually made it harder for people to fall asleep. This suggests that whether it helps or not really depends on each person and their specific situation. How to Use White Noise Safely You can buy special white noise machines from stores, or you can use cheaper options like smartphone apps, which you can find in app stores. If you enjoy nature sounds, pink noise might be a better choice for you, as it includes calming sounds like rain, waterfalls, and flowing rivers. The Sleep Foundation says that some therapists often use pink noise to help treat hearing problems or ringing in the ears (like tinnitus). Here are some safety tips for listening to white noise. Keep the volume low Dr. Bing advises setting your white noise machine to a maximum of 50 decibels. This is similar to the quiet hum of a refrigerator. Maintain a safe distance Place the machine at least 30 centimeters (about a foot) away from your bed, especially for children. Address hearing loss Untreated hearing problems can lead to loneliness and a decline in thinking abilities, both of which increase dementia risk. Get your hearing checked The Alzheimer's Society recommends regular hearing tests, especially if you're between 40 and 65, as hearing loss can be an early sign of dementia or increase your risk. Consider hearing aids There's evidence that using hearing aids might help slow down thinking problems related to dementia.