I can confirm this works, I have been using brown noise for years in crowded open offices as well as in busesand trains and I find it a more predictable help to

I can confirm this works, I have been using brown noise for years in crowded open offices as well as in busesand trains and I find it a more predictable help to focus than ambient or classical music. An effective principle: It does not block sounds, but rather help the brain to ignore them. Individual sounds lose their specifics in an ocean of randomness, and after a few minutes you don't hear them anymore. Privacy through obscurity.