MIT researchers find pink noise improves brain fluid flow during sleep
Science · 6 November 2026
Written by AI from multiple news reports
MIT researchers found that short bursts of pink noise increased brain fluid flow during sleep. This fluid helps carry waste away from the brain.
The study used bursts lasting 50 milliseconds. Pink noise includes every sound frequency humans can hear, with lower sounds louder than higher ones. It sounds like rain or a distant waterfall.
Earlier studies suggest pink noise may help people fall asleep faster and sleep more deeply. Some research also suggests memory benefits, especially for older adults.