Laser microphone - windows can listen too!

[Густов Владимир Александрович]

Laser microphone - windows can listen too!



Laser microphone is a covert surveillance device that uses a laser beam to capture sound vibrations in distant objects. This technology can be used for wiretapping with minimal risk of detection. Typically, the object to which the beam is directed is located inside the room where the conversation is taking place, and can be any object that can vibrate in response to pressure fluctuations caused by noise in the room (for example, a picture on the wall). Smoother objects are more suitable. The laser beam, being directed into the room through the window, is reflected from the object into the receiver, which converts it into an audio signal. Also, the beam can be reflected from the window itself. Often, laser microphones are portrayed in feature films as devices used by spies, as they can be used to pick up sound from a distance. The laser beam is directed to the surface of the window pane or to another flat surface that is under the influence of sound. Vibrations of this surface change the angle of reflection of the beam, and the movement of the laser point of the returned beam is fixed and transformed into an audio signal.

 

[root]

LASER MICROPHONE A simple and fun DIY device. [/B]

 

[Марат (МОД)]

A very complex and expensive option for obtaining information, the chance of reconciliation is almost minimal.

 

[Детективное агентство ОПЦИОН]

Blinds, heavy curtains and the simplest thing - dirty windows !!!!! And we get the abru cadabra)))))))

 

[Арсен]

Blinds, heavy curtains and the simplest thing - dirty windows !!!!! And we get the abru-cadabra))))))))

I fully support!

 

[Арсен]

If the person you want to listen to is serious, and if the Security Service employees are normal (I mean competently trained, not suckers and not bulls), then they will choose such an office and check it so that any listening will be excluded.

 

[Марат (МОД)]

If the person you want to listen to is serious, and if the Security Service is normal (I mean competently trained, not suckers and not bulls), then they will choose such an office and so it will be checked that any listening will be ruled out.

I agree, though the question here is whiter than the appropriateness of protection against this type of attack, I agree with what was said earlier - a dirty window, curtains, but it is banal if the window opens, the beam changes its direction and the receiver, of course, does not catch it. It is officially accepted that such an attack is possible only when being in front of the object of observation - the consulate of a number of countries, and not all of them.

 

[Густов Владимир Владимирович]

I agree, though the question here is whiter than the appropriateness of protection against this type of attack, I agree with what was said earlier - a dirty window, curtains, but it is trite if the window opens, the beam changes its direction and the receiver, of course, does not catch it. It is officially accepted that such an attack is possible only when being in front of the object of observation - the consulate of a number of countries, and not all of them.

Good day!

I can not agree with you. For modern systems, the dirt on the windows is not an obstacle, especially since it is more dirty and its light transmission will be lower, the easier it is to use the window itself as a resonator. Just like curtains, they are an excellent canvas for recording acoustic vibrations.

Despite this, it’s really easy to protect yourself from laser microphones with Vibroacoustic and acoustic noise In particular, there are also curtains with built-in vibro-acoustic emitters.

 

[Густов Владимир Владимирович]

If the person you want to listen to is serious, and if the Security Service staff are normal (I mean competently trained, not suckers and not bulls), then they will choose such an office and check it so that any listening will be excluded.

Good day!

Unfortunately, it is almost impossible to achieve 100% protection against information leakage. In every room, in addition to artificial ones, there are a large number of natural channels for information leakage and there will always be a victory between the warring parties where there is a larger budget and superior engineering.

It is enough to turn to history and recall the famous endovibration system at the U.S. Embassy , which in its essence is a very simple construction and its role can be played by any metallized hemisphere, for which it will be necessary to select a resonant frequency.