How harmful is noise to people?

There are high and low levels of noise. Low-intensity noise is generally not harmful to people's physical and mental health, and in many cases it is also beneficial to improve work efficiency. The high-intensity noise mainly comes from industrial machines (such as looms, lathes, air compressors, pickaxes, blowers, etc.), modern vehicles (such as cars, trains, motorcycles, tractors, airplanes, etc.), loudspeakers, construction sites, and the noise of shopping malls, sports and entertainment venues.

These high-intensity noises harm people's organisms, make people feel tired, produce negative emotions, and even cause diseases. High-intensity noise not only damages people's hearing, but also has varying degrees of impact on the nervous system, cardiovascular system, endocrine system, digestive system, vision, intelligence, etc.

If a person lives and works in a noise environment of 95 decibels for a long time, about 29% of them will lose their hearing; Even if the noise is only 85 decibels, 10% of people will be deaf; 120 130 decibels of noise, which can make people feel pain in the ear; Stronger noises can cause damage to the auditory organs. In the nervous system, strong noise can cause headache, dizziness, fatigue, insomnia, emotional restlessness, memory loss and other symptoms, increased EEG slow waves, autonomic nervous system dysfunction, etc.; In the cardiovascular system, strong noise can cause changes in pulse and heart rate, increased blood pressure, irregular heartbeat, conduction obstruction, peripheral blood flow changes, etc.; In the endocrine system, strong noise can cause hyperthyroidism, enhanced adrenal cortical function, increased basal metabolic rate, sexual dysfunction, menstrual disorders, etc.; In terms of the digestive system, strong noise can cause people to have decreased digestive function, gastric dysfunction, decreased stomach acid, loss of appetite, etc. In short, strong noise can cause a series of physiological and pathological changes in the human body.

In a survey of 202 people who worked in an environment with noise levels of 95 decibels, 39% had dizziness, 32% had insomnia, 27% had headaches, 27% had stomach pain, 27% had palpitations, 27% had memory loss, 22% were upset, 18% had poor appetite, and 12% had high blood pressure. Therefore, we should not take loud noises lightly and take measures to prevent them. Of course, people are more sensitive to noise, and there are great differences between individuals, some people are more sensitive to noise, and some people have strong adaptability to noise, which is also related to people's needs, emotions and other psychological factors.

Regardless of the differences between people, there is always a need to prevent strong noise.