Thursday, 22. August 2013
Topic: SECURITY - on August 22, 2013 at 3:08:00 PM CEST
Laser listening: Could you eavesdrop on the Guardian?
The UK government has warned the Guardian newspaper that foreign agents could use laser technology to eavesdrop on them, in the wake of recent surveillance leaks. What are laser listening devices and are they effective?
When we speak, our voices produce sound waves. Sound waves travel in all directions and can hit anything in the room around you. If the sound waves hit something solid, they bounce off.
Laser listening devices are designed to pick up the vibrations produced by sound waves as they hit resonant surfaces - ones that are good for picking up vibrations - such as a window or a plastic cup.
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