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Unit 8 Lesson 3
Isn't it too loud!
Objectives: By the end of the lesson you will have
• read a passage and answered questions
• interpreted tables for cause and effect
• practised writing sentences with if and when
A Do you know that living in a noisy environment can be bad for your health ? Can you think of five things inside and outside your house that create too much noise? Write them down. Work in pairs and compare your list with your partner. Arc there any that are common in both your lists?
B Read the following passage and answer the questions that follow.
The unit by which the loudness of sound is measured is called a decibel. According to the UN, the normal tolerance limit of sound is 45 decibels. When the vibration of sound is at a tolerable, pleasant level, it is simply called sound. But when it is sharp and harsh to the cars it becomes noise. Serious harm can be caused to people if they are regularly exposed to sounds exceeding 70 decibels. Because of the growth of urban population and the increasing use of machines in our everyday life there has been a general increase in the level of sound around us. On an average, people in the cities are exposed to sounds ranging from 30 to 90 decibels or even more. A study m Japan has found that housewives who live in the city were exposed to almost the same amount of sound that a factory worker was exposed to at his/her workplace. The occupations that the study found to be the noisiest were factory work, truck driving and primary school teaching.
Many developed countries arc trying to control sound pollution by careful town planning and developing public awareness. In Holland schools are not allowed near airports and houses which are situated near airports are provided with special types of insulation to limit the sound heard inside the buildings.
1 At how many decibels would you call a sound noise?
2 Do you think life in the village would be equally noisy?
3 Do you think the life of a housewife in a Bangladeshi city would also be similar to that of a factory worker?
4 Why does the Japanese study consider the occupation of a primary school teacher to be very noisy?
5 What other occupations would you call noisy?
6 How can public awareness be developed about noise pollution?
C Look at the table below which shows the amount of sound produced by different sources in our everyday life. Which ones of these would you call sound and which ones noise? Which are the most harmful among them? Why?
Sound by
Decibel level
Busy traffic (in Dhaka city),
75-85.
Diesel truck,
80.
Motorcycle,
100.
Live rock music (with amplifier),
90-130.
Refrigerator,
45.
Alarm clock,
80.
Dripping water from tap,
40.
Streaming child,
90-115.
Table-1
D Look at the pictures below. From your reading of the chart above, guess now many decibels of sound might be produced by each. Write the number of decibels under each picture.
Picture
Read Table 2 below. Discuss in pairs which effects would directly affect (a) students, (b) patients, (c) both of them.
Effects of living continuously in a noisy environment
• gradual deafness
• rising blood pressure
• irritability • increase in normal rate of heartbeat
• annoyance
• lack of concentration
• outbursts of rage
Table-2
E Write a complete sentence with each one of the phrases in Table 2 using 'if'
Example: If we live 'in a noisy' environment continuously we might gradually become deaf.
F There was a marriage ceremony at your next door neighbour's house. They played music through the loudspeaker the whole day and night making life very uncomfortable for your family, \\rite a letter to the editor of The Rising Sun explaining how you suffered and why indiscriminate use of loudspeakers should be stopped.
Focus :
Skills.
Reading,
speaking,
writing. Functions.
Expressing possibilities.
Grammar/Structure.
If + present tense.
Vocabulary.
vibration, tolerable, pleasant, harsh,
exposed to.
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Unit 8 Lesson 3
Isn't it too loud!
Objectives: By the end of the lesson you will have
• read a passage and answered questions
• interpreted tables for cause and effect
• practised writing sentences with if and when
A Do you know that living in a noisy environment can be bad for your health ? Can you think of five things inside and outside your house that create too much noise? Write them down. Work in pairs and compare your list with your partner. Arc there any that are common in both your lists?
B Read the following passage and answer the questions that follow.
The unit by which the loudness of sound is measured is called a decibel. According to the UN, the normal tolerance limit of sound is 45 decibels. When the vibration of sound is at a tolerable, pleasant level, it is simply called sound. But when it is sharp and harsh to the cars it becomes noise. Serious harm can be caused to people if they are regularly exposed to sounds exceeding 70 decibels. Because of the growth of urban population and the increasing use of machines in our everyday life there has been a general increase in the level of sound around us. On an average, people in the cities are exposed to sounds ranging from 30 to 90 decibels or even more. A study m Japan has found that housewives who live in the city were exposed to almost the same amount of sound that a factory worker was exposed to at his/her workplace. The occupations that the study found to be the noisiest were factory work, truck driving and primary school teaching.
Many developed countries arc trying to control sound pollution by careful town planning and developing public awareness. In Holland schools are not allowed near airports and houses which are situated near airports are provided with special types of insulation to limit the sound heard inside the buildings.
1 At how many decibels would you call a sound noise?
2 Do you think life in the village would be equally noisy?
3 Do you think the life of a housewife in a Bangladeshi city would also be similar to that of a factory worker?
4 Why does the Japanese study consider the occupation of a primary school teacher to be very noisy?
5 What other occupations would you call noisy?
6 How can public awareness be developed about noise pollution?
C Look at the table below which shows the amount of sound produced by different sources in our everyday life. Which ones of these would you call sound and which ones noise? Which are the most harmful among them? Why?
Sound by
Decibel level
Busy traffic (in Dhaka city),
75-85.
Diesel truck,
80.
Motorcycle,
100.
Live rock music (with amplifier),
90-130.
Refrigerator,
45.
Alarm clock,
80.
Dripping water from tap,
40.
Streaming child,
90-115.
Table-1
D Look at the pictures below. From your reading of the chart above, guess now many decibels of sound might be produced by each. Write the number of decibels under each picture.
Picture
Read Table 2 below. Discuss in pairs which effects would directly affect (a) students, (b) patients, (c) both of them.
Effects of living continuously in a noisy environment
• gradual deafness
• rising blood pressure
• irritability • increase in normal rate of heartbeat
• annoyance
• lack of concentration
• outbursts of rage
Table-2
E Write a complete sentence with each one of the phrases in Table 2 using 'if'
Example: If we live 'in a noisy' environment continuously we might gradually become deaf.
F There was a marriage ceremony at your next door neighbour's house. They played music through the loudspeaker the whole day and night making life very uncomfortable for your family, \\rite a letter to the editor of The Rising Sun explaining how you suffered and why indiscriminate use of loudspeakers should be stopped.
Focus :
Skills.
Reading,
speaking,
writing. Functions.
Expressing possibilities.
Grammar/Structure.
If + present tense.
Vocabulary.
vibration, tolerable, pleasant, harsh,
exposed to.