White noise is (according to Wikipedia):
Discrete signal whose samples are regarded as a sequence of serially uncorrelated random variables with zero mean and finite variance.
What does this mean?
This mean that white noise is a constant noise made up of many different sounds, like the sound of a TV or radio powered on but not receiving good signal.
The point is that in the following study: White Noise Improves Learning by Modulating Activity in Dopaminergic Midbrain Regions and Right Superior Temporal Sulcus published in the MIT’s Journal of Cognitive Neuroscience, and the authors reach the following conclusion:
In neural systems, information processing can be facilitated by adding an optimal level of white noise. Although this phenomenon, the so-called stochastic resonance, has traditionally been linked with perception, recent evidence indicates that white noise may also exert positive effects on cognitive functions, such as learning and memory…
So to be able to study more efficiently understanding everything and retaining in on memory, the best thing to do is not to hide in the most silent corner of your house with earplugs. But don’t go to a bar neither haha.
The optimum is to have a constant and soft noise.
This is probably because the brain doesn’t like the lack of stimuli. For example, the next room you see:
Has that particular design that makes it the quietest room in the world.
The sound within it is -9 decibels, when in a normal room is about 30. It is so quiet you can even hear your blood flowing through your veins. You can also hear your ears, yes, they apparently also make noise.
The most someome has being inside it are 45 minutes. The brain in the absence of stimuli begins creating it, causing severe hallucinations.
This post was written more than 6 months ago, maybe things have changed or I don't think the same way anymore