2. Teacher`s Identity Md.Tajul Islam (Nayon) Lecturer in English Hybatnagar A.U Kamil madrasa Kishoregonj.

3. Class /11-12 Sub : English 1st Paper Unite :9 Time: 45 minutes Date: 28/02/ 2015

5. Title announcement Lesson-3 Isn’t it too loud!

8. Student will be able to convey * The way of measuring of the vibration of sound. * The causes and effects of sound pollution. * About the normal tolerance of sound. * The consequence of living in a gradual noisy environment. * Types of profession which are related with noise pollution, the of controlling sound pollution.

9. Let’s have a video on sound pollution

10. 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 simply called sound. But when it is sharp and harsh to the ears it become noise. Serious harm can be caused to people if they are regularly exposed to sounds exceeding 70 decibels……… Vocabularies: pollution = contamination (making dis comfortable) Noise =sound, urban = town, Rural = pastoral, vibration = Harsh =unpleasant to hear, Tolerable =comfortable,

11. Individual Activities What is noise pollution? Find out the causes of sound pollution

12. Group Work Group -1 Identify different kinds of pollutions. Group -2 What is the difference between urban livings and rural livings ?

13. Evaluation What is the difference between pastoral and urban living ? Who are victim to regular exposal of noise pollution? Do you know school teaching,Truck Driving and laboring in factories are similar in types? Are you careful to town planning, public awareness and Special types of buildings for primary school ?

14. Home Work Going your home, diagnose some occupations which are parallel to exposal of noise pollution to write in your next class.

15. Thanks