Laser Microphone

A laser microphone using lasers to bounce sound at source. Instead, its main purpose is to improve the voice or sound, like a traditional microphone, laser microphone surveillance. It's like the microphone that most people associate with the microphone speech. A conventional microphone uses a sensor that reacts to voices and music and transforms the sounds into an electrical signal audio. A microphone is based on the laser beam is possible to obtain a smooth surface and transmission back to the receiver, which is a sound.

If someone wants to make a verbal exchange, knows one or more speakers, a microphone is often used for laser machining. Many films of espionage and detective shows on TV have microphones laser. The microphone is often in a room near Stakeout. The beam passes through a window, and just focus on trade secret, not to raise suspicions.

Although this instrument is usually, sometimes successfully proposed acquisition spy adventure scenario neutralized by an anti-surveillance techniques. This method was discovered using high-tech light sensors detect the laser beam away or throw back to the source. In some cases, reverse nefarious characters only in rooms with the waves, windows and doors, as this type of glass prevents the penetration success of laser and destroy the transmission.

Using a beam of light to record audio from a remote location is passed as the first Léon Theremin, around 1947, got a tracking device in the Soviet Union. The infrared beam is in place of the laser, but it worked well enough for the head of the secret service, the KGB, use it to spy on the British Embassy, French and American in Moscow during the Second World War. It is believed that the laser mic on the market now regularly used by U. S. National Security Agency.

Until recently, laser microphones, special equipment used by secret agents in movies, books and TV programs or actual government institutions. In the real world, it's just easier for the supervision. This changed in October 2009 when a popular magazine published guidelines for electronic article by the way, you can use to create their own laser microphone.

Recent developments in laser microphones using smoke or vapor with the laser beam. Requires a surface to bounce the bar, but uses a flow of steam or smoke to detect the waves in the country. A U.S. patent on this new laser microphone was published in August 2009.