Science Experiments | Sound - Introduction

Introduction

You hear sound when vibrations enter your ears and send signals through your nerves to your brain. These vibrations are caused by disturbances in the air. For example, when you hit a drum, the top of it vibrates, causing a disturbance in the molecules in the air. This vibration, or sound waveA regular disturbance that carries energy through matter or space without carrying matter., travels through the air in all directions, eventually reaching your ears.

If you could see sound waves, they would look much like the waves you see when you drop a stone onto a calm water surface.