From using your Apple Watch to track your sleep habits to not using ... Noise comes in various colors, including blue, brown, ...

Pink noise has recently become the darling of all the sleep sounds, presumably due to the fact that recent research has shown pink noise can increase time spent in deep sleep and improve memory.

The lower octaves have more power, and the higher octaves have less power. Pink noise is generated to test loudspeakers in a room as well as to "tune" a room for best audio reproduction.