Q46 of 47 Page 13

How can we control noise?

To control noise we must control the source of noise. For this silencing devices must be designed and installed in aircrafts engines, heavy transport vehicles, industrial machines and home appliances.

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43 What is noise pollution? What are its major causes? 44 What sources in the home may lead to noise? 45 What are the harms of noise pollution? 47 How can the noise pollution be controlled in a residential area?