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It’s a presentation by S.M.Nasrullah Senior Lecturer in English, Cambrian College

It’s a presentation by S.M.Nasrullah Senior Lecturer in English, Cambrian College. Watch the video clip and try to guess the theme of it. English For Today Class-xi. Isn’t It Too Loud !. Unit-8, Lesson-3. Learning outcome.

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It’s a presentation by S.M.Nasrullah Senior Lecturer in English, Cambrian College

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  1. It’s a presentation by S.M.Nasrullah Senior Lecturer in English, Cambrian College

  2. Watch the video clip and try to guess the theme of it

  3. English For Today Class-xi Isn’t It Too Loud ! Unit-8, Lesson-3

  4. Learning outcome By the end of the lesson the students will be able- 1. to differentiate between “Sound” and “Noise” and learn the unit of measuring sound. 2. to find out the causes and effects of sound pollution and ways of reducing sound pollution. 3. to write sentences with first conditional using ‘if’.

  5. Difference between “Sound’ and “Noise” When the vibration of air is at a tolerableandpleasant level to human hearing is known as “sound.” But When the sound is unpleasant and loud, it is called “noise”. It is harsh and irritating.

  6. What is “Decibel” ? Unitof measuring loudness of sound is “Decibel”. Remember carefully:(about sound) Human’s Tolerance limit - 45 decibel Harmful for human – (70+) decibel Cities’ sound range – (30-90) decibel

  7. Causes of sound pollution

  8. Causes of sound pollution • Factory work • Primary school teaching • Truck driving • Airport • growth of urban population • increasing use of machines in cities

  9. Bad effects of noise pollution

  10. Bad effects of noise pollution • Lack of concentration • Increases human anger • Affects our hearing • Increases our heartbeat

  11. Things to be done to reduce “noise pollution” Master plan of a city 1. Raising public awareness 2. Careful town planning

  12. Word meaning;Measure (act of measuring) Insulation (0ne kind of layer used inside the room to protect Sound)

  13. Word meanings: Expose – Show, ExhibitProvide- Supply, givePleasant – pleasing to the mindExceed- cross, be more or greater than

  14. Learning Grammar:(From Text)Use of 1st Conditional: If+ Present+ Future Example- 1. If you come, I shall/will go. 2. If we live in a noisy environment, we will gradually become deaf. Zero Conditional(exception): If + Present + Present Example: 1. If we heat ice, it turns into water. 2. If they are regularly exposed to sounds exceeding 70 decibel, serious harm can be caused. `a

  15. Group work: Find out which cause ‘sound” and which cause “noise”. Motor cycle – 100 decibel Diesel truck- 80 decibel Refrigerator- 45 decibel Live Rock Music -90-130 decibel Vehicles in Dhaka city-75-85 decibel Alarm Clock- 80 decibel Screaming child – 90-115 decibel

  16. Evaluation: Answer the Questions:1. What do you mean by “sound” and “noise”?2. What occupations are responsible for noise pollution?3. What can be done to decrease noise pollution?

  17. Home work: Write down the names of other things which make sound pollution in the cities.

  18. Best of luck

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