In everyday life, designing spaces that both let air flow and absorb sound can be a tricky balancing act. Usually, materials that allow air to pass through—like vents—also let sound escape, making it ...

A strange form of matter called a time crystal has fascinated physicists for about a decade. These systems move in repeating ...

Sometimes, even the simplest things can set off a quantum phenomenon.

Ordinarily, light transmits the same in both directions: if I can see you, you can see me. Now, however, researchers have created a device that uses travelling sound waves to break this symmetry, ...

Basketball shoes on a gym floor, bicycle brakes in need of a tune-up, or the squeal of tires are everyday examples of squeaking sounds. Such sounds have long been attributed to stick-slip friction, or ...

Although few people ever get the chance to travel at the speed of sound, it is an alluring flight goal and an impressive technological feat. Though average people have flown at high speeds on ...

Sound is a wave which is made up of vibrations in the air. It is caused by the movement of energy travelling through a medium as it propagates away from the source of the sound. Since sound wave ...