I have recently discovered 'brown sound'. No, it's not toilet related
, it's a type of sound wave and it's nice and relaxing and screens out ambient noise which can lead to sensory overload and stress.
White sound and pink sound can be a bit high pitched and 'fizzy', but brown sound is a lower frequency and you can still concentrate and do your usual stuff whilst having it on. It's not distracting.
I have an app for my iPad/phone which I put on to block noise.
Anybody else do stuff like this?