There are many sounds around us: natural sounds (such as birdsong or a rushing stream), sounds made by people (such as talking or making music), sounds from machines (such as cars, aircraft or lawnmowers) or a combination of all of these. Some of these sounds we want to hear but others we don’t.
The sound we don’t want to hear is called noise. We can encounter noise every day, such as the sound from cars and aircraft or even the sound from other people in your school or playground shouting when your class is being quiet.