SomethingAboutScience
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80万 回視聴 ・ 36819いいね ・ 2025/03/11
In this video, I build a laser microphone, a device that can pick up sound from a distance using just a laser and receiver. This technology was first used during the Cold War by the KGB and is still used today. By shining a laser beam at a window, sound waves inside the room cause tiny vibrations that modulate the reflected light. Using a photodiode sensor and an amplifier circuit, we can convert those fluctuations into audio. I’ll be testing this homemade laser microphone to see if it actually works for listening through windows.
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