What Causes ‘Sound’ and Why Do We Hear It Differently in Different Places?

Sound is like a wave that moves through things. When you speak, your voice makes tiny pushes and pulls in the air around you. These pushes and pulls move from one place to another, kind of like ripples in a pond. If there are lots of things in the way, like walls or people, it can make the sound go quieter or even change how it sounds.

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Examples

Your voice echoes in a big empty room because it bounces off the walls.
You can't hear your friend's whisper from across the classroom because there are too many people and things in the way.
A loudspeaker sounds much louder near the stage than at the back of the auditorium.

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Categories: Physics · sound,acoustics,waves