Scientists Are Testing ‘Pink Noise’ as a Sleep Aid

The study is exciting because it shows clearly that pink noise, slow waves, and these pulses of CSF flow are closely linked, says Ngo-Dehning, and it opens the door to studies where researchers intentionally boost CSF flow to see if it can help, say, people with poor sleep or people with neurodegenerative conditions that may be caused by impaired waste removal from the brain. “That would be the next step,” he says.