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  2. Covert listening device - Wikipedia

    en.wikipedia.org/wiki/Covert_listening_device

    A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and police investigations. Self-contained electronic covert listening devices came into common use with ...

  3. Radio-frequency sweep - Wikipedia

    en.wikipedia.org/wiki/Radio-frequency_sweep

    Portable sweep equipment may be used to detect some types of covert listening device (bugs). In professional audio, the optimum use of wireless microphones and wireless intercoms may require performing a sweep of the local radio spectrum, especially if many wireless devices are being used simultaneously. The sweep is generally limited in ...

  4. Public address system - Wikipedia

    en.wikipedia.org/wiki/Public_address_system

    A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.

  5. ADI Global Distribution - Wikipedia

    en.wikipedia.org/wiki/ADI_Global_Distribution

    ADI Global Distribution is a wholesale distributor of security, pro-AV and low-voltage products for contractors, installers, and resellers. [1] The company has over 190 locations throughout North America, Puerto Rico, Europe, the Middle East, and Africa. ADI's inventory includes products such as video surveillance, building access control, home ...

  6. Laser microphone - Wikipedia

    en.wikipedia.org/wiki/Laser_microphone

    Laser microphone. A laser microphone is a surveillance device that uses a laser beam to detect sound vibrations in a distant object. It can be used to eavesdrop with minimal chance of exposure. The object is typically inside a room where a conversation is taking place and can be anything that can vibrate (for example, a picture on a wall) in ...

  7. Category : Manufacturers of professional audio equipment

    en.wikipedia.org/wiki/Category:Manufacturers_of...

    Pages in category "Manufacturers of professional audio equipment" The following 70 pages are in this category, out of 70 total.

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