White noise & sleep
Back before the days of digital televisions or radios, you may remember quickly turning the volume down when that awful noise came blaring through the speakers, signifying there was no signal.
So, how is it that white noise can actually help us sleep?
White noise gets its name from ‘white light’ – all frequencies of colour in combination. White noise is a mix of every audible frequency at the same amplitude.
The sound of white noise we hear as humans is the sound of all the frequencies between 20 and 20,000 Hz.
White noise can mask louder or unwanted noises such as traffic, housemates or neighbours, etc. The white noise will engage your brain, however, will not stimulate or arouse the brain, allowing one to relax and sleep.