Cheap DIY build lets users eavesdrop with the speed of light.

[Redaktion]

Laser microphones may sound like a sophisticated spy kit, but as YouTuber SomethingAboutScience has proven, they are surprisingly easy to build. Users are just a handful of components away from capturing modulated light and transforming it into sound.

https://www.notebookcheck.net/Cheap-DIY-build-lets-users-eavesdrop-with-the-speed-of-light.984436.0.html