Sound needs a medium, such as a gas, liquid, or solid, to travel through. It moves through these mediums by causing the particles within the medium to vibrate, starting from the original source of the sound.
- For example, when you speak, the sound of your voice pushes against the nearby air particles. These particles then bump into the particles next to them, and this chain reaction continues until the sound reaches your friend’s ears.
- This means that the particles of the medium don’t travel all the way from the speaker to the listener; instead, sound is transmitted as a series of vibrations through the medium caused by the initial disturbance from the sound source.
