What is a laser microphone?

The

laser microphone uses the laser beam to discourage the sound back to its source. Instead of its main purpose, it is to amplify a voice or sound like a traditional microphone, a laser microphone is used to watch. It's nothing like a microphone that most people connect with the word microphone. The traditional microphone uses a sensor that responds to voices or music and converts sounds into a sound electrical signal. The laser microphone relies on the transmitted laser beam that is able to land on a smooth surface and bounce back into the transmission receiver where it becomes audible. Many spy films and detective programs in television feature laser microphones. The microphone is often displayed that it is set in a room near Stakeout. Its beam is precisely directed through the window and the goal is to record the hidden exchanges arms suspicion.

While this secret tool is usually successful in spy scenarios, the record is sometimes thwarted by a common anti -visibility technique.This detection method uses laser beam detection and deactivation or tracking back to its source. In some cases, shameful characters only conversion in rooms with woolen glass windows and doors, as this type of glass prevents the laser beam from penetrating and spoils the transmission.

The use of light beam to record sound from a detached place is assumed that he was first successful for Leon Themin, who invented eavesdropping in the Soviet Union around 1947. Its beam was an infrared place of the laser, but it worked well enough to use the head of the secret service, KGB, for spying on Moscow British, French and American embassies during World War II.

until recently, laser microphones were mainly used by TAny agents in movies, books and television shows or real government agencies. In the real world, they were easily accessible only to those who were in the monitoring area. All of this changed in October 2009, when the popular Electronics Magazine magazine published an article with instructions that anyone could use to create their own laser microphone.

The latest development in laser microphones uses smoke or pair in conjunction with the laser beam. It does not require the beam to bounce the surface, but rather uses steam or smoke stream to detect waves. American patent for this new laser microphone was released in August 2009.