Noise is usually expressed in decibels. L ~ 140 decibel is the whole range of human hearing. 1 dB is the lowest sound intensity that can be distinguished by hearing, while 140 dB is the highest sound intensity that human ears can tolerate. The noise at home mainly comes from household appliances such as audio equipment and TV sets. The key to prevent noise hazards is to control and eliminate noise sources. People with sensorineural deafness or severe neurasthenia should pay more attention to avoiding noise.
What is noise? What harm does noise pollution do to people?
Noise is a kind of sound that causes people to be agitated or loud and is harmful to human health.
Noise pollution mainly comes from social noise such as traffic, vehicle horn, industrial noise, building construction, concert hall, tweeter, morning market and people talking loudly.
The physical and psychological damage caused by noise mainly includes the following aspects:
Hearing Impairment Experiments show that people's hearing will be impaired after 8 hours of continuous listening to the sound of motorcycles; If you are in a rock concert hall, your hearing will be impaired in half an hour.
It is harmful to people's cardiovascular system. According to the survey of urban noise and residents' health in China, the incidence of hypertension increases by 3% for every increase of 1 decibel in regional noise.
It affects people's nervous system and makes them irritable.
Affect sleep and cause fatigue.
What does decibel value mean? The decibel value represents the unit of measurement of sound.
The sound that the human ear can just hear is 0- 10 decibel. Every increase of 1 0dB means that the volume increases by10dB, that is, from1dB to 20dB, which means that the volume increases by100th.
People speak in a low voice about 30 decibels, and speak loudly about 60-70 decibels. A decibel value below 60 is a harmless zone, 60- 1 10 is a transitional zone, and 1 10 is a harmful zone. The car noise is 80- 100 decibels, and the TV sound can reach 85 decibels. Living in a noise environment with 85-90 decibels for a long time, people will get "noise disease". The sound of the chainsaw is 1 10 decibel. The sound of a jet plane is about 130 decibels. When the sound reaches 120 decibels, people's ears will feel pain. In biology, it affects people's lives and makes people sick.
Harm of noise pollution
Long-term exposure of pregnant women to noise exceeding 50 decibels will lead to endocrine gland dysfunction, mental stress and endocrine system disorder. Serious will raise blood pressure, fetal hypoxia and ischemia, leading to fetal malformation, and even abortion. Moreover, high decibel noise will damage the fetal hearing organs, causing some areas to be affected. It affects the development of the brain and leads to mental retardation in children.
The malignant stimulation of noise seriously affects our sleep quality, which will lead to neurasthenia symptoms such as dizziness, headache, insomnia, dreaminess, memory loss, inattention, and digestive tract symptoms such as nausea, vomiting, stomachache, bloating and loss of appetite. Nutritionists have found that noise can also increase the consumption of vitamins, amino acids, glutamic acid, lysine and other trace elements in the human body, affecting health; Noise increases adrenal gland secretion, heart rate and blood pressure, which easily leads to heart attack; At the same time, noise can reduce the secretion of saliva, gastric juice and gastric acid, thus suffering from gastric ulcer and duodenal ulcer. It is harmful to people's cardiovascular system. According to the survey of urban noise and residents' health in China, the incidence of hypertension increases by 3% for every increase of 1 decibel in regional noise.
It affects people's nervous system and makes them irritable.
Affect sleep and cause fatigue.
way
1 build a soundproof forest
2. Move enterprises with serious noise pollution out of urban areas.
3 source prevention, reduce the transmission process
The physical and psychological damage caused by noise mainly includes the following aspects:
1, hearing loss. Relevant data show that people's hearing will be impaired after 8 hours of continuous listening to the sound of motorcycles; If you are in a rock concert hall, your hearing will be impaired after half an hour; If you live in a noise environment above 80 decibels, the possibility of deafness can reach 50%.
2. Noise impairs vision
As we all know, noise will seriously affect the hearing organs and even make people lose their hearing. However, there is a subtle internal "connection" between ears and eyes. When noise acts on the auditory organs, it will also "diffuse" the visual organs through the action of the nervous system, which will weaken people's vision.
It is pointed out that noise can make color vision and color gamut abnormal. The survey found that among 80 workers exposed to steady noise, the visual field of red, green and white was as high as 80%, which was 85% higher than that of the control group.
The influence of noise on eyesight can be seen everywhere in daily life. For example, when shopping in a quiet and bright store, it looks very pleasant and calm, so you can choose carefully and buy everything. However, when the tweeter plays fast-paced pop music loudly (some so-called pop music is just deafening noise), shopping tends to be restless, dazzling, and even mixed with random transactions. I didn't buy what I should have bought, but I was dissatisfied because I didn't identify it carefully. The main reason is that dry sound affects vision.
3. It is harmful to people's cardiovascular system. According to the Survey of Urban Noise and Residents' Health in China, the incidence of hypertension increases by 3% for every increase of 1 decibel in regional noise.
4, affecting people's nervous system, making people irritable.
Scientific research has found that noise can stimulate and inhibit the nervous system. People who work in noisy environment for a long time can also cause neurasthenia syndrome (such as headache, dizziness, tinnitus, memory loss, vision loss, etc.). ).
5, affecting sleep, causing fatigue.
Harm of noise to sleep: Sudden noise can wake up 10% of people at 40 decibels, and 70% of people at 60 decibels.
Psychologically speaking, noise will first cause psychological symptoms such as poor sleep, inattention, memory loss, etc., and then lead to irritability, emotional instability, and even decreased patience and bad temper, and finally produce a series of diseases such as hypertension, ulcer and diabetes. Psychologically, this disease is called psychosomatic disease, which refers to a physical disease caused by psychological factors. Dr. Li also introduced that the probability of psychosomatic diseases caused by noise is quite high, the treatment is difficult and it takes a long recovery period, which brings great troubles to people's daily life and work.
The direct harm of noise to human body includes: destroying human nerves, causing vasospasm, accelerating the metabolism of hair cells, thus accelerating the arrival of aging period. In clinical diagnosis, the external manifestations of patients are that the whole person is in a bad mood, emotional and speaks loudly; The most common symptoms are tinnitus, earache, hearing loss, dizziness, headache and noise deafness; For babies who are in the growth and development stage, the harm of noise is particularly obvious. Babies who are often in a noisy environment will not only suffer from hearing impairment, but also suffer from intellectual development. Because noise can cause sensory nerve damage and hair cell damage, it is difficult to repair.
Relevant experts believe that noise is very harmful to the human body, and the impact of noise (decibel) on the human body: for example, 0-50 decibels: comfortable, quiet; 50-90 decibels: it interferes with sleep, sadness and anxiety; 90- 130 dB: itchy ears and earache; /kloc-above 0/30 db: eardrum rupture, deafness.
Harm of noise
Near the airport, hens can't lay eggs; The music played by the band is so harsh that the audience can suddenly faint. These are all caused by noise. From a biological point of view, the annoying sound that no one needs is noise. From the physical point of view, noise refers to the sound with disordered sound intensity and frequency. Environmental noise mainly comes from transportation, industrial production, building construction and social life. In cities, traffic noise has the greatest impact on residents. The influence and harm of noise mainly include: First, it affects hearing, and the degree of hearing damage is related to the exposure time in the noise environment. In the noise environment above 85 decibels, the incidence of noise deafness can reach 5%. Second, it affects study and work and interferes with sleep. In noisy environment, the correct rate of doctors auscultating patients is only 8%. For example, when the noise reaches 100 to 200 decibels, almost everyone will wake up from sleep. Third, it affects cardiovascular function and endocrine system. This is mainly manifested in tachycardia, arrhythmia and hypertension. The fourth is to harm the central nervous system. In the strong noise environment, there will be symptoms such as headache, tinnitus, dreaminess, memory loss and general weakness. Fifth, it affects children's intellectual development. It has been investigated that the intelligence of children in noisy environment is 20% lower than that of children in quiet environment.
Experiments show that people's hearing will be impaired if they listen to the sound of motorcycles for 8 hours. If you stay in the rock concert hall for half an hour, people's hearing will be damaged, which is harmful to people's painstaking system. According to the Survey of Urban Noise and Residents' Health in China, the incidence of hypertension in this area increases by 3% for every increase of 1 decibel in regional noise. In France, three out of every four mental patients are caused by noise. 35% suicides in Paris and Tokyo are caused by noise. Another 35% of criminals are related to noise. Different noises have different effects on people. For example, intermittent noise has a greater impact on people than persistent noise. Noise at night has a greater impact than noise during the day. The noise of household appliances affects the quality and quantity of people's sleep, which in turn affects people's work efficiency and has a negative impact on health. According to statistics, 84% of the population in the United States is seriously disturbed by noise, and 20% of the population is threatened by strong noise and their hearing is impaired.
Through a series of examples, we can see that noise is increasingly affecting our life, work and study, and even leading to social conflicts and economic losses. It is very important to control noise. We can do a small experiment: there are two classes of students. One class A is set in a noisy environment, and the other class B is set in a quiet environment. We all study the same course together. Under the guidance of the same teacher, after a month's study, you will find that the efficiency of Class A is far less than that of Class B. What is the reason? The above experimental results are very obvious, and noise will do great harm to people's hearing. Noise affects people's activities widely. In the past, people often regarded deafness as a common disease of the elderly, but scientific experiments have proved that people are not necessarily deaf when they are old, and noise is an "invisible killer" that leads to hearing loss or even deafness. It can be seen that noise is very harmful to us, so it is urgent to understand the harm of noise and stop it. In biology, it affects people's lives and makes people sick.
Harm of noise pollution
Long-term exposure of pregnant women to noise exceeding 50 decibels will lead to endocrine gland dysfunction, mental stress and endocrine system disorder. Serious will raise blood pressure, fetal hypoxia and ischemia, leading to fetal malformation, and even abortion. Moreover, high decibel noise will damage the fetal hearing organs, causing some areas to be affected. It affects the development of the brain and leads to mental retardation in children.
The malignant stimulation of noise seriously affects our sleep quality, which will lead to neurasthenia symptoms such as dizziness, headache, insomnia, dreaminess, memory loss, inattention, and digestive tract symptoms such as nausea, vomiting, stomachache, bloating and loss of appetite. Nutritionists have found that noise can also increase the consumption of vitamins, amino acids, glutamic acid, lysine and other trace elements in the human body, affecting health; Noise increases adrenal gland secretion, heart rate and blood pressure, which easily leads to heart attack; At the same time, noise can reduce the secretion of saliva, gastric juice and gastric acid, thus suffering from gastric ulcer and duodenal ulcer. It is harmful to people's cardiovascular system. According to the survey of urban noise and residents' health in China, the incidence of hypertension increases by 3% for every increase of 1 decibel in regional noise.
It affects people's nervous system and makes them irritable.
Affect sleep and cause fatigue.
way
1 build a soundproof forest
2. Move enterprises with serious noise pollution out of urban areas.
3 source prevention, reduce the transmission process
The physical and psychological damage caused by noise mainly includes the following aspects:
1, hearing loss. Relevant data show that people's hearing will be impaired after 8 hours of continuous listening to the sound of motorcycles; If you are in a rock concert hall, your hearing will be impaired after half an hour; If you live in a noise environment above 80 decibels, the possibility of deafness can reach 50%.
2. Noise impairs vision
As we all know, noise will seriously affect the hearing organs and even make people lose their hearing. However, there is a subtle internal "connection" between ears and eyes. When noise acts on the auditory organs, it will also "diffuse" the visual organs through the action of the nervous system, which will weaken people's vision.
It is pointed out that noise can make color vision and color gamut abnormal. The survey found that among 80 workers exposed to steady noise, the visual field of red, green and white was as high as 80%, which was 85% higher than that of the control group.
The influence of noise on eyesight can be seen everywhere in daily life. For example, when shopping in a quiet and bright store, it looks very pleasant and calm, so you can choose carefully and buy everything. However, when the tweeter plays fast-paced pop music loudly (some so-called pop music is just deafening noise), shopping tends to be restless, dazzling, and even mixed with random transactions. I didn't buy what I should have bought, but I was dissatisfied because I didn't identify it carefully. The main reason is that dry sound affects vision.
3. It is harmful to people's cardiovascular system. According to the Survey of Urban Noise and Residents' Health in China, the incidence of hypertension increases by 3% for every increase of 1 decibel in regional noise.
4, affecting people's nervous system, making people irritable.
Scientific research has found that noise can stimulate and inhibit the nervous system. People who work in noisy environment for a long time can also cause neurasthenia syndrome (such as headache, dizziness, tinnitus, memory loss, vision loss, etc.). ).
5, affecting sleep, causing fatigue.
Harm of noise to sleep: Sudden noise can wake up 10% of people at 40 decibels, and 70% of people at 60 decibels.
Psychologically speaking, noise will first cause psychological symptoms such as poor sleep, inattention, memory loss, etc., and then lead to irritability, emotional instability, and even decreased patience and bad temper, and finally produce a series of diseases such as hypertension, ulcer and diabetes. Psychologically, this disease is called psychosomatic disease, which refers to a physical disease caused by psychological factors. Dr. Li also introduced that the probability of psychosomatic diseases caused by noise is quite high, the treatment is difficult and it takes a long recovery period, which brings great troubles to people's daily life and work.
The direct harm of noise to human body includes: destroying human nerves, causing vasospasm, accelerating the metabolism of hair cells, thus accelerating the arrival of aging period. In clinical diagnosis, the external manifestations of patients are that the whole person is in a bad mood, emotional and speaks loudly; The most common symptoms are tinnitus, earache, hearing loss, dizziness, headache and noise deafness; For babies who are in the growth and development stage, the harm of noise is particularly obvious. Babies who are often in a noisy environment will not only suffer from hearing impairment, but also suffer from intellectual development. Because noise can cause sensory nerve damage and hair cell damage, it is difficult to repair.
Relevant experts believe that noise is very harmful to the human body, and the impact of noise (decibel) on the human body: for example, 0-50 decibels: comfortable, quiet; 50-90 decibels: it interferes with sleep, sadness and anxiety; 90- 130 dB: itchy ears and earache; /kloc-above 0/30 db: eardrum rupture, deafness.
In biology, it affects people's lives and makes people sick.
Harm of noise pollution
Long-term exposure of pregnant women to noise exceeding 50 decibels will lead to endocrine gland dysfunction, mental stress and endocrine system disorder. Serious will raise blood pressure, fetal hypoxia and ischemia, leading to fetal malformation, and even abortion. Moreover, high decibel noise will damage the fetal hearing organs, causing some areas to be affected. It affects the development of the brain and leads to mental retardation in children.
The malignant stimulation of noise seriously affects our sleep quality, which will lead to neurasthenia symptoms such as dizziness, headache, insomnia, dreaminess, memory loss, inattention, and digestive tract symptoms such as nausea, vomiting, stomachache, bloating and loss of appetite. Nutritionists have found that noise can also increase the consumption of vitamins, amino acids, glutamic acid, lysine and other trace elements in the human body, affecting health; Noise increases adrenal gland secretion, heart rate and blood pressure, which easily leads to heart attack; At the same time, noise can reduce the secretion of saliva, gastric juice and gastric acid, thus suffering from gastric ulcer and duodenal ulcer. It is harmful to people's cardiovascular system. According to the survey of urban noise and residents' health in China, the incidence of hypertension increases by 3% for every increase of 1 decibel in regional noise.
It affects people's nervous system and makes them irritable.
Affect sleep and cause fatigue.
way
1 build a soundproof forest
2. Move enterprises with serious noise pollution out of urban areas.
3 source prevention, reduce the transmission process
Psychologically speaking, noise will first cause psychological symptoms such as poor sleep, inattention, memory loss, etc., and then lead to irritability, emotional instability, and even decreased patience and bad temper, and finally produce a series of diseases such as hypertension, ulcer and diabetes. Psychologically, this disease is called psychosomatic disease, which refers to a physical disease caused by psychological factors. Dr. Li also introduced that the probability of psychosomatic diseases caused by noise is quite high, the treatment is difficult and it takes a long recovery period, which brings great troubles to people's daily life and work.
The direct harm of noise to human body includes: destroying human nerves, causing vasospasm, accelerating the metabolism of hair cells, thus accelerating the arrival of aging period. In clinical diagnosis, the external manifestations of patients are that the whole person is in a bad mood, emotional and speaks loudly; The most common symptoms are tinnitus, earache, hearing loss, dizziness, headache and noise deafness; For babies who are in the growth and development stage, the harm of noise is particularly obvious. Babies who are often in a noisy environment will not only suffer from hearing impairment, but also suffer from intellectual development. Because noise can cause sensory nerve damage and hair cell damage, it is difficult to repair.