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Noise is constant and loud sound. To measure the loudness, or volume of sounds, people use a unit called a decibel. When a sound is louder than 70 decibels, it can cause noise pollution. Do you know that the noise from a vacuum cleaner or a motorcycle can result in permanent hearing loss after eight hours? The sounds of a concert are even more serious. They can reach as high as 130 decibels and may cause immediate and permanent hearing loss. Noise pollution can also lead to headaches and high...
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Noise is constant and loud sound. To measure the loudness, or volume of sounds, people use a unit called a decibel. When a sound is louder than 70 decibels, it can cause noise pollution. Do you know that the noise from a vacuum cleaner or a motorcycle can result in permanent hearing loss after eight hours? The sounds of a concert are even more serious. They can reach as high as 130 decibels and may cause immediate and permanent hearing loss. Noise pollution can also lead to headaches and high blood pressure. If you are listening to music through headphones, and other people can hear it. it means the music is too loud and unsafe. If there seems to be a ringing or buzzing in your ears, it means the noise is affecting you and damaging your hearing- Wearing earplugs when you go to concerts or other loud events, and listening to music through headphones or headsets at safe levels can help you reduce the effects of noise pollution.

1. What do people use to measure the loundness or volume of sounds ?

.............................................................................................................................................

2. Does the noise from a vacuum cleaner result in pernament hearing loss after eight hours ?

..............................................................................................................................................

3. What can noise pollution also lead to ?

..............................................................................................................................................

4. Is the music safe when you listen to it through headphones , and other people can hear it as well ?

..........................................

5. What can you do to help reduce the effects of noise pollution ?

1
21 tháng 1 2018

Noise is constant and loud sound. To measure the loudness, or volume of sounds, people use a unit called a decibel. When a sound is louder than 70 decibels, it can cause noise pollution. Do you know that the noise from a vacuum cleaner or a motorcycle can result in permanent hearing loss after eight hours? The sounds of a concert are even more serious. They can reach as high as 130 decibels and may cause immediate and permanent hearing loss. Noise pollution can also lead to headaches and high blood pressure. If you are listening to music through headphones, and other people can hear it. it means the music is too loud and unsafe. If there seems to be a ringing or buzzing in your ears, it means the noise is affecting you and damaging your hearing- Wearing earplugs when you go to concerts or other loud events, and listening to music through headphones or headsets at safe levels can help you reduce the effects of noise pollution.

1. What do people use to measure the loundness or volume of sounds ?

They use a unit called a decibel to measure the loundness or volume of sounds

2. Does the noise from a vacuum cleaner result in pernament hearing loss after eight hours ?

Yes, it does

3. What can noise pollution also lead to ?

It can also lead to headaches and high blood pressure

4. Is the music safe when you listen to it through headphones , and other people can hear it as well ?

No, it isn't

5. What can you do to help reduce the effects of noise pollution ?

I can wear earplugs when you go to concerts or other loud events, and listening to music through headphones or headsets at safe levels to help reduce the effects of noise pollution

15. Farmers in our area usually use (pesticides/ herbicides/ waste/ sewage) to kill insects 16. If we (polluted/ pollute/ pollution/ pollutant) the air, more people will have breathing problems 17. If you can experience noise pollution for a long time, you can have headache, high blood pressure and (hearing loss/ contaminant/cough/ radiation) 18. Because the water is polluted, (aquatic/ electric/ chemical/ fresh) plants may also die 19. (Noise/ Headache/ Earplug/ Symptom) is any sound that...
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15. Farmers in our area usually use (pesticides/ herbicides/ waste/ sewage) to kill insects

16. If we (polluted/ pollute/ pollution/ pollutant) the air, more people will have breathing problems

17. If you can experience noise pollution for a long time, you can have headache, high blood pressure and (hearing loss/ contaminant/cough/ radiation)

18. Because the water is polluted, (aquatic/ electric/ chemical/ fresh) plants may also die

19. (Noise/ Headache/ Earplug/ Symptom) is any sound that is loud and constant.

20. Do you know what (polluted/ pollute/ pollution/ pollutant) cause air pollution

21. (Poison/ Poisonous/ Poisoning/ Poisoned) chemical waste is dumped into the river by many factories

22. The (dead/ die/ death/ died) fish are floating in the water.

23. We plant trees, (due to/ because/ because of/ so) we can have fresh air.

24. When the loudness of sounds is more than (20 dBs/ 30dBs/ 50 dBs/ 70dBs), noise pollution happens

25. Too much carbon dioxide (CO2) in the atmosphere (causes/ lead/ result/ make) to global warming

26. Waste from households will gradually (contamination/contaminate/contaminant/ contaminated) the lake.

27.People in countries like the USA, Great Britain, and New Zealand use English as their (official/ foreign/ native/ mother) language.

28. “Loch” is a Scottish word for “ (river/ sea/ lake/ pond)”.

29.A (sari/ kilt/ kimono/ scarf) is the traditional garment which is often worn by Scottish men on special occasions.

1
7 tháng 3 2020

15. Farmers in our area usually use (pesticides/ herbicides/ waste/ sewage) to kill insects

16. If we (polluted/ pollute/ pollution/ pollutant) the air, more people will have breathing problems

17. If you can experience noise pollution for a long time, you can have headache, high blood pressure and (hearing loss/ contaminant/cough/ radiation)

18. Because the water is polluted, (aquatic/ electric/ chemical/ fresh) plants may also die

19. (Noise/ Headache/ Earplug/ Symptom) is any sound that is loud and constant.

20. Do you know what (polluted/ pollute/ pollution/ pollutant) cause air pollution

21. (Poison/ Poisonous/ Poisoning/ Poisoned) chemical waste is dumped into the river by many factories

22. The (dead/ die/ death/ died) fish are floating in the water.

23. We plant trees, (due to/ because/ because of/ so) we can have fresh air.

24. When the loudness of sounds is more than (20 dBs/ 30dBs/ 50 dBs/ 70dBs), noise pollution happens

25. Too much carbon dioxide (CO2) in the atmosphere (causes/ lead/ result/ make) to global warming

26. Waste from households will gradually (contamination/contaminate/contaminant/ contaminated) the lake.

27.People in countries like the USA, Great Britain, and New Zealand use English as their (official/ foreign/ native/ mother) language.

28. “Loch” is a Scottish word for “ (river/ sea/ lake/ pond)”.

29.A (sari/ kilt/ kimono/ scarf) is the traditional garment which is often worn by Scottish men on special occasions.

30.When (visual/ thermal/ light/ radioactive) pollution happens, the water temperature in streams, rivers or oceans changes. 31.We can’t see stars at night (because of/ because/ since/ due) the light pollution. 32. If you (was / were/ are/ could be) in my position, you would understand me. 33. If the water temperature (increase/ increases/ is increased/ increased), some aquatic creatures will be unable to reproduce. 34. Because the water is polluted, (aquatic/ electric/ chemical/ fresh)...
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30.When (visual/ thermal/ light/ radioactive) pollution happens, the water temperature in streams, rivers or oceans changes. 31.We can’t see stars at night (because of/ because/ since/ due) the light pollution.

32. If you (was / were/ are/ could be) in my position, you would understand me.

33. If the water temperature (increase/ increases/ is increased/ increased), some aquatic creatures will be unable to reproduce. 34. Because the water is polluted, (aquatic/ electric/ chemical/ fresh) plants may also die

35. (Noise/ Headache/ Earplug/ Symptom) is any sound that is loud and constant

36. Do you know what (polluted/ pollute/ pollution/ pollutant) cause air pollution

37. (Poison/ Poisonous/ Poisoning/ Poisoned) chemical waste is dumped into the river by many factories

38. The (dead/ die/ death/ died) fish are floating in the water.

39. We plant trees, (due to/ because/ because of/ so) we can have fresh air

40. When the loudness of sounds is more than (20 dBs/ 30dBs/ 50 dBs/ 70dBs), noise pollution happens

41. Too much carbon dioxide (CO2) in the atmosphere (causes/ lead/ result/ make) to global warming

42. Waste from households will gradually (contamination/contaminate/contaminant/ contaminated) the lake.

43.When (visual/ thermal/ light/ radioactive) pollution happens, the water temperature in streams, rivers or oceans changes. 44. Many seabirds were (die/ death/ dead/ died) because of the oil spill

. 45. (Aquatic/ Electric/ Chemical/ Fresh) plants may also die because of the polluted water

46. If we (polluted/ pollute/ pollution/ pollutant) the air, more people will have breathing problems

47. If you can experience noise pollution for a long time, you can have headache, high blood pressure and (hearing loss/ contaminant/cough/ radiation)

1
7 tháng 3 2020

30.When (visual/ thermal/ light/ radioactive) pollution happens, the water temperature in streams, rivers or oceans changes. 31.We can’t see stars at night (because of/ because/ since/ due) the light pollution.

32. If you (was / were/ are/ could be) in my position, you would understand me.

33. If the water temperature (increase/ increases/ is increased/ increased), some aquatic creatures will be unable to reproduce. 34. Because the water is polluted, (aquatic/ electric/ chemical/ fresh) plants may also die

35. (Noise/ Headache/ Earplug/ Symptom) is any sound that is loud and constant

36. Do you know what (polluted/ pollute/ pollution/ pollutant) cause air pollution

37. (Poison/ Poisonous/ Poisoning/ Poisoned) chemical waste is dumped into the river by many factories

38. The (dead/ die/ death/ died) fish are floating in the water.

39. We plant trees, (due to/ because/ because of/ so) we can have fresh air

40. When the loudness of sounds is more than (20 dBs/ 30dBs/ 50dBs/ 70dBs), noise pollution happens

41. Too much carbon dioxide (CO2) in the atmosphere (causes/ lead/ result/ make) to global warming

42. Waste from households will gradually (contamination/contaminate/contaminant/ contaminated) the lake.

43.When (visual/ thermal/ light/ radioactive) pollution happens, the water temperature in streams, rivers or oceans changes.( lặp lại câu 30 nhé )

44. Many seabirds were (die/ death/ dead/ died) because of the oil spill

. 45. (Aquatic/ Electric/ Chemical/ Fresh) plants may also die because of the polluted water

46. If we (polluted/ pollute/ pollution/ pollutant) the air, more people will have breathing problems

47. If you can experience noise pollution for a long time, you can have headache, high blood pressure and (hearing loss/ contaminant/cough/ radiation)

The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity that...
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The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity that is moving very rapidly. It may be moving between a cloud and the ground, between two clouds, or between two parts of the same cloud. The lightning heats the air around it. This hot air expands, or get bigger, and it causes the air to move in waves. The air waves pass you in a series, one after another. For this reason, you may hear many rumbles and not just one sound.

____ 29/ Lightning may move between a cloud and the ground.

____ 30/ Thunder is a very bright light in a thunderstorm.

____ 31/ When you hear thunder you may hear a series of loud sounds and not one

big sound. This is because the air waves pass one after another.

____ 32/ Lightning always moves rapidly.

1
23 tháng 1 2018

The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity that is moving very rapidly. It may be moving between a cloud and the ground, between two clouds, or between two parts of the same cloud. The lightning heats the air around it. This hot air expands, or get bigger, and it causes the air to move in waves. The air waves pass you in a series, one after another. For this reason, you may hear many rumbles and not just one sound.

__T__ 29/ Lightning may move between a cloud and the ground.

__F__ 30/ Thunder is a very bright light in a thunderstorm.

__T__ 31/ When you hear thunder you may hear a series of loud sounds and not one

big sound. This is because the air waves pass one after another.

__T__ 32/ Lightning always moves rapidly.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

According to the passage, what group of people will probably first from the use of the microprocessor?

A. Ship's crews 

B. Research engineers 

C. People with insomnia 

D. Engine repair teams 

1
28 tháng 2 2017

Đáp án A

Thông tin ở đoạn cuối: The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

The researcher mentioned in the passage are concerned about unwanted noise because it can_________.

A. cause deafness 

B. create hazardous working conditions 

C. influence ocean waves 

D. damage loudspeakers and sound equipment

1
10 tháng 9 2019

Đáp án B

Thông tin ở câu cuối: … which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

(những âm thanh không mong muốn có thể gây mệt mỏi, ảnh hưởng đến năng suất và sự tỉnh táo của phi hành đoàn, và có thể che mất âm thanh cảnh báo và tín hiệu bão => tạo ra tình trạng làm việc nguy hiểm)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

The passage discusses a way to deal with an offensive noise by_________.

A. diverting people's attention from it

B. masking it with a louder noise 

C. canceling it out electronically 

D. removing its source

1
23 tháng 3 2019

Đáp án C

Thông tin ở câu thứ 2 và 3 của đoạn đầu tiên: One way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. (Một cách để cách âm là sử dụng nút tai. Một cách nữa là triệt tiêu âm thanh với dụng cụ chống âm)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

What is the main purpose of the passage?

A. To discuss a physical handicap

B. To warn about a growing danger 

C. To describe the structure of the ear 

D. To report on a new invention 

1
31 tháng 1 2017

Đáp án D

Mục đích của bài này là To report on a new invention (Giới thiệu một phát minh mới). Phát minh đó là sử dụng bộ vi xử lý (a microprocessor) để loại bỏ các âm thanh không mong muốn

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

The passage compares sound to_________.

A. the rising and falling of water in the ocean 

B. the crests and valleys of mountain ranges 

C. a flag waving in the air 

D. a machine for gauging air pressure 

1
30 tháng 3 2017

Đáp án A

Thông tin ở câu đầu tiên của bài đọc: Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. (Âm thanh di chuyển hình thành nguồn gốc của nó trong tai bởi biến động trong áp suất không khí, một cái gì đó giống như các đỉnh và đáy của sóng biển.)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

A paragraph following the passage would most probably discuss_________.

A. the nature of fog 

B. a way to improve alarm systems 

C. other causes of fatigue 

D. other uses for the microprocessor 

1
19 tháng 1 2017

Đáp án D

Bài đọc này chủ yếu nói về công dụng loại bỏ, tách âm thanh của bộ vi xử lý (a microprocessor). Vì vậy, đoạn sau của bài đọc này có thể sẽ nói về những công dụng khác của bộ vi xử lý này