It can also be used to see sound. Sound, after all, is just another change in air density — a traveling compression wave. A speaker pushes on the surrounding air, creating a wave that travels ...

What if we could see sound waves? The world would look like a fuzzy, vibrating mess. Sound is normally invisible, but there's a photographic trick that actually lets us see what it looks like.

Using light, data can, and often does ... a sound wave using light? This actually happens all the time but with very low efficiencies. Let's start by thinking about what sound waves look like.

In fact, sound waves in the space around the Earth are very important to our continued technological existence. They also they sound pretty weird! You may like NASA turns the screams of a dying ...