You can now receive a visual notification on your iPhone or iPad if a fire alarm, siren, doorbell, baby’s cry or other important sound occurs.

Spiders can detect sound and movement using slits in their legs, and scientists devised a new sensor that works in a similar way.

Researchers are developing a universal sound to enable partially sighted people to detect when an escooter is approaching.

Most people are familiar with lasers. But what about a laser made with sound rather than light? A couple of physicists have now created one that they plan to use for measuring imperceivable forces.