A brief noise stimulus can make people upset, upset and irritable. Long-term exposure to noise will directly cause hearing organ damage, such as degenerative changes in the inner ear or deafness. Scientists have also found that noise can damage visual function through the nervous system, cause visual field obstacle, affect color discrimination and destroy eye balance. In addition, noise is a malignant stimulus, which acts on the central cerebral cortex for a long time, causing imbalance between excitement and inhibition, and involving the autonomic nervous system, resulting in headache, dizziness, tinnitus, palpitation, insomnia, general weakness and other symptoms. In severe cases, it can cause mental disorder, elevated blood pressure, coronary heart disease and arteriosclerosis. It can also cause ulcers. Recently, it has been suggested that noise can affect human metabolism, especially increase the consumption of water-soluble vitamins B 1, B2, B6 and vitamin C.
Therefore, in the noise area, in addition to taking necessary measures to reduce or eliminate industrial and traffic noise pollution, workers in the noise environment should be equipped with protective equipment, supplemented with vitamin B and C tablets, and eat fruits and vegetables rich in vitamins.
In addition to industrial and traffic noise, domestic noise can not be ignored, especially for children and the elderly.
At present, with all kinds of household appliances entering thousands of households, all kinds of hazards including noise must not be taken lightly. According to statistics, the noise of TV sets and tape recorders can reach 60 ~ 80 decibels; Washing machine 40 ~ 70 decibels; The refrigerator is 30 ~ 50 decibels. The state expressly stipulates that the environmental noise in residential areas should not exceed 50 decibels during the day and be lower than 45 decibels at night. Otherwise, it will affect the hearing and vision of children and the elderly, as well as the intellectual development and physical and mental health of children. It will also affect people's sleep.