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.
2. The harm of noise composition Listening to noise melody has its beauty, and people will naturally listen; Teaching has its enlightenment, and people will naturally listen; Wind and rain have their own charm, and people will naturally listen.
But, do you want to listen to the noise? How? To tell the truth, I really have feelings for noise. And this mood is changing.
I remember reading an explanatory article about the harm of noise. In addition, my family lives around Wujiaochang, and the sound of car horns on the road is annoying enough every day, and the sound of roadside machines "cutting stones and taking soil" is even more annoying.
It can be said that I suffer from noise. I know that noise can affect people's hearing, and it can also lead to high blood pressure, heart disease and memory loss ... I am really tired of noise sometimes, so my family moved.
Gradually, I found that the noise around me was gone, but I felt something was missing. Because I found that the noise around my ears had a new meaning. When I think about the source of noise carefully, I will find that it is related to construction. Isn't the origin of architecture all because of the construction of Shanghai? When I pay more attention to noise, I will find that it is closely related to the development of Shanghai's automobile industry and the improvement of people's living standards.
Yes, the noise in our life marks the rapid changes in Shanghai. Now I really like listening to noise.
Because of the noise, buildings have sprung up, and the Oriental Pearl and Jinmao Tower have stood tall. People move into buildings from humble and crowded low-rise bungalows and live in comfortable and beautiful high-rise buildings.
Because of the noise, bridges have been built in the air, and viaducts, subways, light rails, tunnels and advanced maglev trains have been opened to traffic. People have gone from walking on muddy roads to driving on wide roads, and have also entered the era of galloping on elevated roads.
Because of the noise, various prosperous areas emerge one after another, and shopping worlds such as Xujiahui, Nanjing Road and Huaihai Road have been built one after another. People shop from stalls to shops and then to shopping streets.
It is the noise that enables Shanghai to hold such a grand F 1 event and APEC meeting. It is this noise that makes Shanghai popular with foreigners and become a tourist attraction. It is noise that has improved people's lives, Shanghai has developed rapidly and the motherland has spread its wings and taken off. Now, whenever I hear noise, I have an impulse to listen to it, and I can't help but follow it with its beat. That kind of happiness and happiness surround me all the time.
Today, I like to listen to this voice, because it will be accompanied by the pace of progress to meet a better future. How to listen to the noise? I just want to say: listen attentively and you will feel the rapid development of the motherland; .
3. Harm of Noise There are many kinds of noises in life. Noise is everywhere. It can be said that it is varied and varied. For example, talking in class, car horns in the city ... are all noise. I remember when I was chopping wood, I heard the deafening noise from the machine, and there was always a car horn near the school. It does great harm to people, especially to our ears. They disturb our class. I hope so.
One day at school, I was walking on the road with my schoolbag on my back, and the roadside was full of cars. The driver of the big truck is uncivilized and honks his horn: "beep, beep". The harsh voice startled me, and I was unhappy, angry and angry.
If a heart patient walks on the road and suddenly can't stand the pain you bring, he dare not think about the consequences. If I am a driver and you are a pedestrian, are you happy? At night, everything is quiet, and your sleeping friend suddenly hears you knocking at the door and making a very loud noise. The quiet night was broken and the dream was awakened because the noise prevented him from enjoying the dream. Are you happy? Some people say "it's too noisy".
Others will say, "ears seem to be fighting noise." People scold noise everywhere, but no one praises it.
Please make the noise disappear at once. You have done us a lot of harm. Please give us all beautiful, harmonious and pleasant sounds, and let us spend every day happily.
4. The topic is the harm of noise. How to write a composition? Harm of noise. In life, all kinds of harsh noises can be seen everywhere, such as the ticking of car horns and the whining of trains.
Next, let me give an example of my personal experience! Well ... my mother took me to school by bike this morning, and it happened that she brought her mobile phone to tell me stories. But mom didn't bring headphones, so forget it. The noise outside actually disturbed my thoughts.
The noise outside disturbed my thoughts. A motorcycle beeped in front of me several times in a row, which made me miss the most wonderful story. I am so angry! Well, there is more! It is said that if pregnant women are exposed to noise above 50 decibels for a long time, their blood pressure will rise, and the fetus will be deprived of oxygen and water, leading to fetal malformation and even abortion. However, high decibel noise will damage the hearing organs of the fetus, causing some areas to be affected.
It affects the development of the brain and leads to mental retardation in children. Finally, I hope everyone will stay away from noisy places, and at the same time, everyone should not make noise and endanger others.
5. Harm and Control of Noise (Essay on Science and Technology) The sounds that affect normal work and life are collectively called noise. Noise is not necessarily the high decibel, and noise is definitely not the low decibel.
For example, if you watch a movie in the cinema, the decibel value of the sound is very high, often exceeding 90 decibels, but it can't be called noise for the people who watch the movie. However, if the sound insulation effect of the cinema is not good, the sound will be transmitted to the adjacent residential building, which may be only 50 decibels after attenuation, but it is noise for the people inside, because the sound causes discomfort.
The following are the reference values of human hearing tolerance: 44 decibels-acceptable level; 55 decibels-I feel a little annoyed; 60 decibels-no drowsiness; 70 decibels-making people nervous; 85 decibels-covering your ears is unacceptable; 100 decibel-can make your ears temporarily lose hearing; 120 db-can instantly pierce your eardrum; 160 dB- broken glass; 200 decibels-causing death. A decibel value below 60 is a harmless zone, 60- 1 10 is a transitional zone, and 1 10 is a harmful zone.
This shows how harmful noise is to human body! Noise pollution mainly comes from car horns, industrial noise, building construction, concert halls, speakers, loud noises and so on. Most of them are man-made. Therefore, as long as everyone is civilized, some noises can be reduced, such as car horns, loud talking, industrial noise ... as the saying goes, "there is noise above and noise below."
Smart people have also come up with many ways to deal with it, such as: inventing sound insulation glass, planting a variety of flowers indoors, and putting a "protective layer" on your ears-earplugs ... There are many ways to deal with noise. Of course, the best way is to "uproot", so as to eliminate noise permanently and effectively.
6. Write an expository essay on the topic of "There are many benefits of greening" and an argumentative essay on the topic of "There are many benefits of greening". Nowadays, problems that seriously endanger human health such as flooding, air pollution and noise are closely intertwined with human beings, and more people die at their hands. As the saying goes, "the magic is one foot high and the Tao is one foot high." The solution to these problems comes down to only two words: greening. Don't underestimate it. Planting trees and grass also helps to improve air quality. First of all, green plants can carry out photosynthesis in the sun, absorb carbon dioxide and release oxygen. Studies show that plants can produce 5 tons of oxygen for every 65,438+0 tons of growth. Each hectare of forest can absorb 1 ton of carbon dioxide and produce 0.735 ton of oxygen every day. Each hectare of grassland can absorb 0.9 tons of carbon dioxide and produce 0.6 tons of oxygen every day. Adequate and clean oxygen can keep people healthy. Secondly, the forests on the earth can emit 654.38+700 million tons of terpenoids into the atmosphere every day, which has unparalleled bactericidal ability and exciting effect. Then green plants can filter and absorb dust in the air to prevent working dust from spreading into the air. It is measured that the atmosphere passes through the forest belt. The number of negative oxygen ions in the forest can reach10-100000. Negative oxygen ions can regulate the excitation and inhibition of nervous system and improve the function of cerebral cortex. Medical experts simulate the magical effect of the forest and introduce negative oxygen ions into the ward. The results show that when the ratio of negative oxygen ions to positive oxygen ions in the environment is controlled at 9: 1, it is harmful to asthma, burns and ulcers. Greening also has the functions of absorbing noise and reducing soil erosion. Put your strength into the greening of our country, and that touch of green will slowly tell you its benefits.
7. The topic is the harm of noise. How to write a composition? Harm of noise
In life, we can see all kinds of harsh noises everywhere, such as the ticking of car horns and the whining of trains.
Next, let me give an example of my personal experience! Well ... my mother took me to school by bike this morning, and it happened that she brought her mobile phone to tell me stories. But mom didn't bring headphones, so forget it. The noise outside actually disturbed my thoughts. The noise outside disturbed my thoughts. A motorcycle beeped in front of me several times in a row, which made me miss the most wonderful story. I am so angry!
Well, there is more! It is said that if pregnant women are exposed to noise above 50 decibels for a long time, their blood pressure will rise, and the fetus will be deprived of oxygen and water, leading to fetal malformation and even abortion. However, high decibel noise will damage the hearing organs of the fetus, causing some areas to be affected. It affects the development of the brain and leads to mental retardation in children.
Finally, I hope everyone will stay away from noisy places, and at the same time, everyone should not make noise and endanger others!
8. The Harm of Noise A short composition noise is a kind of sound that makes people fidgety or loud and harms human health.
Any sound that interferes with people's normal rest, study and work, as well as the sound that interferes with people's listening, belongs to noise. 1, hearing loss caused by noise.
Noise is the sensory hair cells that damage the auditory organ (cochlea) of the ear. I feel that once the hair cells are damaged, they can never recover. 2. Noise causes cardiovascular damage.
Acute noise exposure usually leads to high blood pressure. 100 dB for ten minutes, the secretion of adrenal hormones increased and sympathetic nerves were excited. 3. Noise affects people's sleep.
4. Psychological effects of noise. Under high-frequency noise, most people are restless and easily excited.
Some measures to prevent noise pollution: (1) build soundproof forest. (2) Move enterprises with serious noise pollution out of urban areas.
(3) Source prevention reduces the transmission process.