Share on Pinterest A new study explored how transcranial random noise stimulation (tRNS) can enhance perception and boost neuroplasticity. Paulien Tabak/EyeEm/Getty Images Most people seek out a quiet ...

Every night, I—like millions of others—put on a noise machine to help me sleep. Mine offers several types of noise: white, pink, green, and brown. I’ve noticed something strange, though. After about ...