ELI5 White Noise - Plus brown noise, pink noise & other colored noises explained

What is white noise? What about the other colored noises? What do these noises do the brain? Why do some people use brown noise as a way to focus?   ... We explain like i'm five!    Thank you to the r/explainlikeimfive community, and specifically the following reddit users whose questions and responses formed the basis of this conversation: takedown1001, acheron_apostolos, insecuredud99, wattwattwatt & smithgentleman   To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Facebook: https://www.twitter.com/eli5ThePodcast/ or send us an e-mail: [email protected]