The word "noise" is not new to us at all. We even get along with him all the time,

With the development of social economy, buildings, car horns, construction site sound, in this common environment can not be affected.

The noise is calculated in decibels. From the medical point of view, pregnant women who are in a noise environment of more than 50 decibels for a long time will cause endocrine gland dysfunction,

And appear mental tension and endocrine system maladjustment. Serious can make blood pressure rise, fetal anoxia and ischemia, cause fetal deformity and even abortion.

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And high decibel noise can damage the fetal hearing organ, causing some areas to be affected. Affect the development of the brain, resulting in mental retardation of children.

The malignant stimulation of noise will seriously affect our sleep quality, and lead to dizziness, headache, insomnia, dreaminess, memory loss

Symptoms of neurasthenia such as inattention and gastrointestinal symptoms such as nausea, vomiting, stomachache, abdominal distention and anorexia.

Nutritionists have found that noise can also increase the consumption of essential nutrients such as vitamins, trace elements, nitrogen based acids, glutamic acids and lysine,

It affects health; noise causes adrenal secretion to increase, heart rate to speed up, blood pressure to rise, which is easy to cause heart disease; at the same time, noise can reduce saliva, gastric juice secretion and gastric acid,

Thus suffering from gastric ulcer and duodenal ulcer. It is harmful to human cardiovascular system, and the investigation of urban noise and residents' health in China shows that the incidence of hypertension increases by 3% for every decibel of noise in the area.

·It affects the nervous system and makes people impatient and irritable. ·Affect sleep, cause fatigue.

Ordinary noise can cause unexpected consequences, so for our health,

Whether we should take some measures to reduce his harm to us, let's understand the sound-absorbing and sound-proof materials as soon as possible!