There’s a growing buzz around pink noise, brown noise, green noise — a rainbow of soothing sounds ... White noise is similar ...

In fact, they were named based on the order of colors in a rainbow ... like radio static, a whirring fan, or humming AC units. Like white noise, brown noise contains all frequencies.

In recent years, videos and playlists of brown noise have gained traction online, attracting millions of listeners. Different types of static noises are named after colours, and white, pink and ...