Can Someone Listen Through Your Windows? How Laser Microphones Work
We usually think of windows as solid barriers that keep the weather out and our conversations in. But in the world of modern security, a window is actually more like a giant microphone. With a device called a Laser Microphone , someone can listen to what you’re saying from hundreds of meters away—without ever stepping foot inside your building. Here is a simple breakdown of how this "spy tech" works and why it matters. The "Bouncing" Secret To understand a laser microphone, you first have to understand vibration . To understand a laser microphone, you first have to understand what sound actually is. When you speak, your vocal cords vibrate. This pushes the air in front of your mouth, creating a "wave" of pressure. Even though a glass window feels solid and stiff to your hand, to a sound wave, it is actually quite flexible. When you talk inside a room, the sound of your voice hits the glass and causes it to vibrate. These vibrations are so small t...