Rainfall in Forest: Sleep with Nature - Ambient Sleep Sounds.
Serotonin is a special hormone, responsible for many physiological functions in the human body and is known as the hormone of happiness. When it rains, the level of serotonin in the human body drops, mood is affected, leading to a feeling of lack of energy and sluggishness. In addition, air humidity also makes you sleepy. When it rains, the “thickness and stickiness” of the air increases. Keeping cool is a human instinct, the body needs to process more moisture so it often feels tired. So the sound of rain in the video will help you experience real rain.
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