Page 94 - Viva ICSE Science 5 : E-book

TIME TO REVISE

Write (T) for true and (F) for false statements.

1. Pleasant sounds are generally high-pitched.
2. Sound produced by loudspeakers is unpleasant to ears.
3. Any loud and pleasant sound is called noise.

4. Only the emergency vehicles have sirens.

5. Noise pollution can cause permanent deafness.

Ways to reduce noise pollution

• Use of public transport and carpools should be encouraged to reduce vehicular

movement on road.

• Honking should be consciously avoided, especially near schools, hospitals and
residential areas.

• Vehicles, machines and appliances at home should be regularly checked and
maintained well to reduce noise.

• Industries, airports, railway stations should be constructed away from residential

areas.

• Bursting of fi re crackers should be avoided as much as possible.

• Use of loudspeakers should be avoided, especially at night.

• Avoid listening to loud music or watching television on high volume.

• Using carpets and curtains at home helps in absorbing noise from outside.

• Planting more trees helps in reducing noise pollution as trees and plants absorb
noise from the surroundings.

TERMS TO KNOW

1. Pleasant sounds: Sounds which are harmonious, and make us feel happy and relaxed

2. Unpleasant sounds: Sounds which are not good to hear and create disturbance
3. Noise: Unpleasant sound

4. Warning sounds: Loud sounds made to alert people about certain situations
5. Noise pollution: A condition when noises become so excessive that they cause disturbance
to the health of living beings

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