Sound comes from just about everywhere – from friends talking, radios playing, and jet planes roaring overhead. Even your breathing makes a tiny sound.
All the sounds you hear – high and low sounds, loud and soft sounds, bouncing and travelling sounds – are alike in one way: they are made when something moves.
Sounds are made when something moves back and forth quickly. The back-and-forth movements that make sound are called vibrations. Usually, the movements are too tiny for you to see. The vibrations travel through the air, almost the same way that waves travel across water. When the vibrations reach our ears, we hear them as sounds.
Vibrations are energy – sound energy. Sound is made up of tiny pushes and pulls. When the vibrations stop, the sound stops, too. You don’t hear another sound until things start vibrating again.
Picture Credit : Google