Harm of noise

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, insomnia, dreaminess, memory loss, inattention, and digestive tract symptoms such as nausea, vomiting, stomach pain, 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 people 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.

Respondent: y 5482 195- level 1 2010-5-1314: 44.

Noise pollution is harmful to people, animals, instruments and buildings, and its degree of harm mainly depends on the frequency, intensity and exposure time of noise. Noise hazards mainly include:

(1) Noise damage to hearing

The most direct harm of noise to human body is hearing loss. When people enter a strong noise environment and are exposed for a period of time, they will feel uncomfortable in both ears and even have a headache. Leave the noisy environment and have a rest in a quiet place, and your hearing will gradually return to normal. This phenomenon is called temporary hearing threshold shift, also known as hearing fatigue. However, if people work in a strong noise environment for a long time and their hearing fatigue cannot be recovered in time, organic lesions will appear in the inner ear organs, that is, permanent hearing threshold deviation will be formed, also known as noise deafness. If people are suddenly exposed to a very strong noise environment, the auditory organs will suffer from acute trauma, which will cause tympanic membrane rupture and bleeding, labyrinth bleeding, and the spiral device will be peeled off from the basement membrane, which may make people completely lose their hearing, that is, sudden deafness.

Research shows that noise pollution is an important cause of presbycusis. In addition, hearing impairment is also related to living environment and occupation. For example, the incidence of senile deafness in rural areas is lower than that in cities, and textile workers, forgers and blacksmiths have more hearing impairment than their peers.

⑵ Noise can induce many diseases.

Because noise acts on the central nervous system of the brain through the auditory organs and affects all organs of the whole body, noise will not only damage people's hearing, but also bring harm to other systems of the human body. Due to noise, there will be neurasthenia symptoms such as headache, brain swelling, tinnitus, insomnia, general fatigue and memory loss. The incidence of hypertension, arteriosclerosis and coronary heart disease in people who work in high noise environment for a long time is 2 ~ 3 times higher than that in people who work in low noise environment. It can be seen that noise can lead to cardiovascular diseases. Noise can also lead to digestive system dysfunction, causing indigestion, loss of appetite, nausea and vomiting, and increasing the incidence of gastrointestinal diseases and ulcers. In addition, noise will also have a certain impact on visual organs, endocrine function and the normal development of the fetus. People who work and live in high noise, the general health level is declining year by year, and their resistance to diseases is weakened, which leads to some diseases, but it is also related to personal physical factors and cannot be generalized.

(3) Noise interferes with normal life and work.

Noise has a great influence on people's sleep. Even in sleep, people's hearing will be stimulated by noise. Noise can lead to dreaminess, easy waking, and decreased sleep quality. The impact of sudden noise on sleep is more prominent. Noise will interfere with people's conversation, work and study. Experiments show that when people are disturbed by a sudden noise, they will be distracted for 4 seconds. According to statistics, noise will reduce labor productivity 10 ~ 50%, and with the increase of noise, the error rate will also increase. It can be seen that noise will distract people's attention, leading to slow response, easy fatigue, decreased work efficiency and increased error rate. Noise will also cover up safety signals, such as alarm signals and vehicle driving signals, which will cause accidents.

(4) the influence of noise on animals

Noise can cause pathological changes in hearing organs, visual organs, internal organs and central nervous system of animals. Noise has a certain influence on the behavior of animals, which can make animals lose their ability to control their behavior, be agitated and lose their normal state. Strong noise will lead to the death of animals. Birds will lose their hair in the noise, which will affect the spawning rate.

5] Harm of ultra-strong noise to instruments, equipment and building structures

Experimental research shows that strong noise will damage instruments and equipment, and even make instruments and equipment ineffective. The influence of noise on instruments and equipment is related to noise intensity, frequency, structure and installation mode of instruments and equipment. When the noise level exceeds 150dB, resistors, capacitors, transistors and other components will be seriously damaged. When strong noise acts on mechanical structures such as rockets and spacecraft, materials will be fatigued and broken due to the repeated action of alternating audio load, which is called acoustic fatigue.

General noise has little effect on buildings, but when the noise level exceeds 140dB, it will start to damage light buildings. For example, when supersonic aircraft pass by at low altitude, there will be sudden changes in pressure and density at the head and tail of the aircraft, and N-type shock waves will be formed after being reflected by the ground. It sounded like an explosion when it reached the ground. This special noise is called rumble. Under the action of suspenders, buildings will be damaged to varying degrees, such as broken doors and windows, broken glass, cracked walls, gypsum falling off, chimney collapse and so on. Boom has slow attenuation, long propagation distance and wide influence range. In addition, the use of air hammer, piling or blasting near buildings will also cause damage to buildings.

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 harm of noise mainly includes the following aspects: the damage to hearing. Experiments have shown that people's hearing will be impaired after 8 hours of continuous listening to motorcycle sounds; 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. The survey of urban noise and residents' health in China shows that 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.

From the perspective of psychoacoustics, noise, also known as noise, generally refers to inappropriate or uncomfortable auditory stimulation. It is a compound sound with many frequencies and aperiodic vibration. In short, noise is an aperiodic sound vibration. Its sound wave shape is irregular and it sounds harsh. From the social and psychological point of view, any sound that interferes with people's study, work and rest and makes people feel uncomfortable is called noise. For example, the sound of running water, knocking, rustling and the roar of machines are all noises. It is measured in decibels. Zero decibel is the lowest intensity of audible sound.

Noise can be divided into high intensity and low intensity. Low-intensity noise is generally harmless to people's physical and mental health, and it is also beneficial to improve work efficiency in many cases. High intensity noise mainly comes from industrial machines (such as looms, lathes, air compressors, pickaxes, blowers, etc.). Modern means of transportation (such as cars, trains, motorcycles, tractors, airplanes, etc.). ), loudspeakers, noise generated by construction sites, shopping malls, sports and entertainment places, etc. These high-intensity noises do harm to people's health, make people feel tired, produce negative emotions and even cause diseases. High-intensity noise not only damages people's hearing, but also affects the nervous system, cardiovascular system, endocrine system, digestive system, vision and intelligence to varying degrees. If people work and live in a noise environment of 95 decibels for a long time, about 29% people will lose their hearing; Even if the noise is only 85 decibels, 10% people will be deaf; 120~ 130 db noise can make people feel ear pain; Strong noise will damage the hearing organs. In the nervous system, strong noise can cause headache, dizziness, burnout, insomnia, emotional anxiety, memory loss, increased EEG slow waves, autonomic nervous system dysfunction and other symptoms. In the cardiovascular system, strong noise will cause changes in pulse and heart rate, elevated blood pressure, arrhythmia, conduction block, changes in peripheral blood flow and so on. In the endocrine system, strong noise will cause hyperthyroidism, adrenal cortex function enhancement, basal metabolic rate increase, sexual dysfunction, menstrual disorder and so on; In the digestive system, strong noise will cause digestive dysfunction, gastric dysfunction, gastric acid reduction, loss of appetite and so on. In a word, strong noise will lead to a series of physiological and pathological changes in human body. 202 people working in the environment with noise as high as 95 decibels were investigated. The results showed that dizziness accounted for 39%, insomnia for 32%, headache for 27%, stomachache for 27%, palpitation for 27%, memory loss for 27%, upset for 22%, poor appetite for 18% and hypertension for 18%. Therefore, we should not take strong noise for granted, and take measures to prevent it. Of course, people are sensitive to noise, and there are great differences among individuals. Some people are sensitive to noise, and some people have strong adaptability to noise, which is also related to psychological factors such as people's needs and emotions. No matter how different people are, strong noise always needs to be prevented.

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. The survey of urban noise and residents' health in China shows that the incidence of hypertension will increase by 3% for every increase of 1 dB in regional noise.

It affects people's nervous system and makes people irritable.

Affect sleep and cause fatigue.