Noise pollution (Green)

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Ppt prepared by my students at Newlands School, Argentina

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  • Noise pollution (Green)

    1. 1. .We want to show you why we can help the world.We want to show you why we can help the world without polluting.without polluting. .The world is in danger and needs our help..The world is in danger and needs our help. .Give us a hand and don’t pollute so as to have a.Give us a hand and don’t pollute so as to have a better worldbetter world We are working on a project about Noise Pollution, if you are interested read our work and now we are going to show the reason why we are doing this.
    2. 2. Noise can be thought of as anNoise can be thought of as an unwanted sound. Noise willunwanted sound. Noise will affect different people inaffect different people in different ways. To one person adifferent ways. To one person a loud band may provide aloud band may provide a pleasant nigth’s entertainment.pleasant nigth’s entertainment. To another the same band mayTo another the same band may represent a stressful, irritatingrepresent a stressful, irritating and even harmful noise.and even harmful noise.
    3. 3. Sound intensity in decibels (dB) Sound 140 Fireworks Plane taking off 120 Emergency vehicle siren Thunder 110 Football crowd Car horn 100 Electric drill 90 Level at wich hearing Protection must be worn in a work place 85 Level at wich hearing Protection must be available in a work place 80 Ringing telephone Hairdryer Vacuum cleaner 70 Washing machine 50 Normal conversation 40 Refrigerator 10 Breathing Leaves rusting 0 Threshold of hearing
    4. 4. More informationMore information Sound is made when something vibrates.Sound is made when something vibrates. This causes the surrounding air to vibrate.This causes the surrounding air to vibrate. This vibrations in the air are transmited asThis vibrations in the air are transmited as sound waves.sound waves. Sound waves traveled faster through solidSound waves traveled faster through solid than through liquids and faster at higherthan through liquids and faster at higher temperatures.temperatures. It can affect a bird (or another thing) if theIt can affect a bird (or another thing) if the animal is near a loud sound. In someanimal is near a loud sound. In some noisy places birds don’t want to live.noisy places birds don’t want to live.
    5. 5. ConclusionConclusion Aircraft can be reduced to some extent byAircraft can be reduced to some extent by designing quieter set enginesdesigning quieter set engines And it´s high time we stopped using cars toAnd it´s high time we stopped using cars to use bikesuse bikes It´s time we didn’t listen to music very highIt´s time we didn’t listen to music very high so that we don´t pollute.so that we don´t pollute. Help us .Help us .
    6. 6. ConclusionConclusion Aircraft can be reduced to some extent byAircraft can be reduced to some extent by designing quieter set enginesdesigning quieter set engines And it´s high time we stopped using cars toAnd it´s high time we stopped using cars to use bikesuse bikes It´s time we didn’t listen to music very highIt´s time we didn’t listen to music very high so that we don´t pollute.so that we don´t pollute. Help us .Help us .

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