Hold on to your wand, Harry Potter: Science has outdone even your best "Leviosa!" levitation spell. Researchers report that they have levitated objects with sound waves, and moved those objects around ...

A new type of extinguisher that uses sound waves to put out fires has been built by two engineering students in the US. Both chemical- and water-free, the invention offers a relatively non-destructive ...

Physicists in France have developed a new form of "touch-screen" technology that relies on detecting the sound waves that are produced when a solid object is tapped by a finger (Appl. Phys. Lett. 87 ...

A sound wave is a vibration that travels through a solid, liquid or gas such as the air or water. A loud sound has a large amplitude, a high pitched sound has a high frequency. Musicians and ...