White noise is composed of 20 ~ 2000 Hz sounds that can be perceived by human ears, and it is a monotonous and regular sound.
Through EEG and magnetoencephalography, scientists found that the brain will resonate with monotonous and regular sounds from outside, which will make the brain in a quiet and relatively inactive state, and at the same time produce fatigue and drowsiness.
Among all kinds of white noise to help sleep, natural rain is the most common and used most. The drowsiness caused by rain not only resonates with the brain, but also may be related to the memory left in genes during human evolution.
In primitive society, when it rains, human beings are restricted from going out and usually can only stay in bomb shelters to rest and sleep, so human genes may retain the conditioned reflex of wanting to sleep when hearing the rain.
Application of white noise
White noise is widely used in the treatment of various insomnia people: it can help newborns fall asleep, provide them with psychological security and comfort, and make newborns emotionally stable;
Can be used as a non-drug substitute to promote sleep and improve people's sleep quality and satisfaction; Can cooperate with music to reduce the anxiety of inpatients;
By reducing the excessive arousal caused by ambient noise in the ward, the sleep of inpatients can be improved and maintained.
In addition, in daily life, masking tinnitus with white noise can improve our evaluation of tinnitus intensity, annoyance, influence on work and life and general feeling, thus improving sleep quality.