White noise machines are speakers that create unstructured sound. This cancels out or covers much of the outside noise surrounding the area.
What does purpose does this serve?
Cancelling outside noise in office settings helps to decrease distractions, improves focus, and overall increases productivity. Of the three methods to reduce noise: absorb, block, and cover, the latter is the most cost effective solution for large open offices.
White noise machines can also create a calming effect in hallways or waiting rooms in hospitals or schools.