Using sound therapy at bedtime has become a popular habit for people struggling to fall asleep or stay asleep. From white noise machines to calming pink noise playlists, these “coloured sleep noises” are widely promoted as natural sleep aids. But do they genuinely support healthy sleep or can relying on them too much backfire?
According to pulmonology experts, coloured noise can be helpful when used correctly and in moderation. White noise works by creating a steady sound that masks sudden environmental disturbances such as traffic or household noises. This makes it easier for light sleepers to drift off and remain asleep without frequent interruptions.
Pink noise, on the other hand, is softer and weighted toward lower frequencies. It closely resembles natural sounds like rainfall or ocean waves. Specialists explain that pink noise may support deeper sleep by syncing with the brain’s slow-wave activity which is responsible for the most restorative phase of sleep. For some people, this can result in feeling more refreshed upon waking.
However, doctors warn against becoming overly dependent on external sounds to fall asleep. Relying too heavily on sound therapy may reduce the brain’s ability to relax naturally in silence. Over time, this can make it difficult to sleep without background noise. Listening at high volumes especially through earphones can also increase the risk of hearing damage.
Medical professionals also caution that coloured noise does not treat underlying sleep disorders. People with conditions such as sleep apnea anxiety-related insomnia or respiratory problems should not use sound therapy as a substitute for medical care. In such cases, using noise may delay proper diagnosis and treatment.
For safer use, experts recommend keeping the volume below 50 decibels and opting for external speakers placed at a distance rather than earphones. When used mindfully, white and pink noise can be useful tools but they should complement healthy sleep habits rather than replace them.
