- Sound travels 343 meters per second.
- It takes about 13 days for a sound wave to travel from the Earth to the Moon.
- Sound can't travel through vacuum, that's why there is no sound in space. Except in a space action film with lots of explosions and lasers.
- Sound travels faster when it's foggy, and even faster in water. The speed of sound in water is four times faster than in air.
- Dolphins hear up to 24 km away.
- Sound can be used as a weapon. At very high amplitudes it can damage your hearing and even cause physical damage.
- Sound has shadow zones. They are based on pressure and on these shadow zones you can't hear any sound at all.
- The sound if a whip cracking is actually the sound of the tip breaking the sound barrier.
- Melophobia is fear of music.