White noise, pink noise, brown noise: Here's what we know
Having a sound machine that helps you sleep sounds like a bizarre concept to some but it is a reality for others. However strange it may seem, there are a lot of people who swear that adding noise to their sleep routine helps them sleep faster, longer and deeper. In recent years, you would have surely heard about people using 'white noise' machines to enhance their sleep quality but did you know there is a whole slew of rainbow noises out there? Let's delve deeper into this concept and understand the science behind these colour noises.
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What are colour noises?
'Colour' of noise is used to describe the frequency of a noise signal on the power spectrum. In simpler terms, each noise signal has a different frequency and strength, so they all sound different to a human ear.?
White Noise
Starting with the one you've probably heard about, White noise sounds like a constant static or hiss of television and radio as it contains equal intensity over all audible frequencies. People use a white noise machine to drown out all the other sounds and claim that it helps them sleep better.
Pink Noise
But, as of late pink noise has become all the rage. Pink noise is slightly different from white noise, as it has more energy in the lower frequency range and gradually decreases as the frequency increases. Pink noise is more sooting, think of the natural sound of rain or a waterfall.
Brown Noise
Even brown noise, also called red noise, is quickly gaining popularity, as brown noise is more intense at lower frequencies you can compare it to the roar of an airplane or waves crashing to the shore.
In recent years, these slew of soothing rainbow noises have gained popularity for several reasons, from facilitating better sleep to helping with memory. Let's see what the science says.
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How can colour noises help you according to science?
According to a study published in the Journal of the American Academy of Child and Adolescent Psychiatry, white and pink noise can provide small benefits for people with ADHD (Attention-deficit/hyperactivity disorder) disorder.
Also, in a small study by scientists at Northwestern University, small pulses of pink noises have demonstrated a potential to enhance the relaxation response and memory.
Further, according to a study published in the National Library of Medicine, using colour noises to improve worker productivity may prove to be a new approach towards productivity improvement.
While further research is required to understand the benefits and harmful effects (if any) of incorporating the use of colour noises, the current studies have shown significant potential regarding how colour noises can be used to better our home and work environment.
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