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Dr. Roneil Malkani demonstrates the set up for a sleep study at the Center for Circadian & Sleep Medicine at Northwestern Medicine in Chicago on May 16, 2024. Pink noise has a frequency profile “very similar to the distribution of brain wave frequencies we see in slow-wave sleep because these are large, slow waves,” said Malkani, assistant professor of neurology at Northwestern University Feinberg School of Medicine. (AP Photo/Laura Bargfeld)
Dr. Roneil Malkani shows an example of pink noise being used to enhance slow brainwaves during deep sleep at the Center for Circadian & Sleep Medicine at Northwestern Medicine in Chicago on May 16, 2024. Pink noise has a frequency profile “very similar to the distribution of brain wave frequencies we see in slow-wave sleep because these are large, slow waves,” said Malkani, assistant professor of neurology at Northwestern University Feinberg School of Medicine. (AP Photo/Laura Bargfeld)
Dr. Roneil Malkani points to a recording of pink noise being played at brief intervals to enhance slow brain waves during deep sleep at the Center for Circadian & Sleep Medicine at Northwestern Medicine in Chicago on May 16, 2024. Pink noise has a frequency profile “very similar to the distribution of brain wave frequencies we see in slow-wave sleep because these are large, slow waves,” said Malkani, assistant professor of neurology at Northwestern University Feinberg School of Medicine. (AP Photo/Laura Bargfeld)