This camera trick lets you SEE sound

Have you ever wondered what sound looks like? Probably not, right? We tend to think of sound as something that can only be perceived through the ears and not through the eyes, but as it happens, there’s a neat camera trick that can allow you to see sound waves in real time. It’s called “Schlieren flow visualization,” and it basically involves using two parabolic mirrors, a high-speed camera, and science (I’m going to leave it to the video to give the actual explanation).

The end result is that we’re able to see silhouetted visualizations of all sorts of different sounds, from the clap of a hand, to the firing of an AK-47, to the explosion of a firecracker.

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