NOISE POLLUTION

NOISE POLLUTION

1. VANESSA: Welcome parents to our class. In Green Hills School we always want to protect the environment, so we will show you how we can to stop noise pollution at home.

2. VICKY: First you will see a video to see what noise pollution is.

3. Manuel asks SEBASTIAN:

-What is noise pollution? Noise pollution is too much sound that you can´t hear another person.

- What are some of the sources of the noise pollution? Noise pollution comes from traffic, industries, factories, and urban areas.

4. VICKY: Now you are going to listen to different sounds and you are going to tell me if you recognize them.

PLAY SOUNDS

4. MANUEL: I will show you the way the sound travels to our ears: for this project we used 2 paper cups, 2 toothpicks, a string. I made a hole in the base of the cup, then I made a knot in the toothpick to hold the string. (Vane and Manuel talk).

5. MANUEL: the voice moves the air inside the cup and makes the string vibrates, then the vibrations travel into the string and into the other cup.

6. VANESSA: now we´re going to see how keen your hearing sense is. I will drop a nail and when you hear the sound you raise your hand. But you must turn around.

7. SEBSTIAN: the sound intensity is measured by decibels, look at the chart.

SOURCE INTENSITY LEVEL

Threshold of hearing (not sound) 0 decibels

Rustling of leaves 10 decibels

Whispering 20 decibels

Normal conversation 60 decibels

Busy street traffic 80 decibels

Ipod at maximum level 100 decibels

Threshold of pain 130 decibels

Military jet take off 140 decibels

Instant perforation of eardrum 160 decibels

8. Vanessa asks VICKY: What are the effects of noise pollution in humans?

People suffer a lot of stress, headaches, they don´t sleep well, they become aggressive, you could get brain and heart damage, and at last lose the hearing.

9. Vicky asks MANUEL: how can the governments prevent noise pollution?

Big cities can use noise barriers and plant green belts that are trees around residential areas or airports. Also having

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