Researchers at ETH Zurich have managed to make sound waves travel only in one direction. In the future, this method could also be used in technical applications with electromagnetic waves.

For a sound to be heard you need three things: A vibrating object A material for the sound wave to travel through, such as air (we call this a medium) Something to detect the sound e.g. your ear ...

Meteorologist David Tilmans explains why sound waves will travel farther on a cold, sunny day than on a clear, warm day.

Researchers have pioneered the use of parallel computing on graphics cards to simulate acoustic turbulence. This type of ...

But not many know how helium works. Helium is much lighter than air, so sound waves move much faster through the gas. This amplifies the higher frequencies in your voice. The gas sulfur ...

But scientists in Cardiff hope to help give extra warning time for tsunamis by using the fast-moving underwater sound waves. "By taking measurements of acoustic gravity waves, we basically have ...