4 ms·
Oh man this is cool! Now we just need OpenSimpleLaserWindow and we can listen to conversations and track people's movements just like the CIA! I forget where I
by jbob2000 9y ago
Oh man this is cool! Now we just need OpenSimpleLaserWindow and we can listen to conversations and track people's movements just like the CIA!
I forget where I read about this, but essentially, as you speak, your sound waves vibrate nearby windows, and these vibrations can be picked up with a laser and translated back into sound.
- godelski 9y agoThere's a few ways you can do this. The cheapest is to just get a laser and a photo diode. It's rough, but you can get sounds. An interferometer works better. It's harder to make and more expensive, but in the hobby range, at least to get decent quality. There's tons of videos and documents that you can find showing you how to make either. You can also do a lot of cool measurements with these setups
- jbob2000 9y agoI had never heard of an interferometer, it actually sounds like something out of a movie haha. Thanks for sharing!
- deleted 9y ago[deleted]
- godelski 9y agoThe design is extremely simple. The hard part is aligning things. That's actually the hard part about most optics. If you're really OCD you need to be even more. Here's a little animation of one: https://www.youtube.com/watch?v=UA1qG7Fjc2A https://www.youtube.com/watch?v=UA1qG7Fjc2A
- deleted 9y ago[deleted]