Introduction Have you ever tried making “walkie-talkies” using a long piece of string and two tin cans? If you have, you know that they work surprisingly well—at longer distances you can hear people ...

A team of scientists has succeeded in cooling traveling sound waves in wave-guides considerably further than has previously been possible using laser light. This achievement represents a significant ...

Sound is the transfer of energy in the form of waves through a substance, or medium, such as air, water, or a flexible solid. You can picture sound waves as a series of nudges that cause particles in ...