Science
How does sound travel?
Sound travels as a wave of vibrations through a medium like air, water, or solids. A vibrating object pushes nearby particles, which bump the next ones, passing the vibration along until it reaches your ear.
See it in motion.
Watch a 2-minute animated lesson that shows exactly how sound works.
Step by step
- 1Sound is a vibration that moves as a pressure wave through a medium.
- 2Particles bump their neighbors, passing energy along — they don't travel with the wave.
- 3It needs a medium, so there's no sound in the vacuum of space.
- 4It travels faster through denser media (solids > liquids > gases).
Frequently asked questions
- Can sound travel in space?
- No — space is a vacuum with no particles to carry the vibration, so sound can't travel.
- Why does sound travel faster in water than air?
- Water's particles are closer together, so vibrations pass between them more quickly.
- How do we hear sound?
- Sound waves vibrate the eardrum; tiny structures convert that into nerve signals the brain interprets.