![]() For instance, with the right equipment, it is possible to remotely activate the microphone of cellular phones, even when a call is not being made, to listen to conversations in the vicinity of the phone. With no moving parts and greater power efficiency, these solid-state devices could be operated by small batteries, which revolutionized the process of covert listening.Ī bug does not have to be a device specifically designed for the purpose of eavesdropping. By 1956, the US Central Intelligence Agency was designing and building "Surveillance Transmitters" that employed transistors, which greatly reduced the size and power consumption. Self-contained electronic covert listening devices came into common use with intelligence agencies in the 1950s, when technology allowed for a suitable transmitter to be built into a relatively small package. ![]() Illegal use of listening and recording devices.Legal use of listening and recording devices.Legal requirements of listening and recording device use.Remotely activated mobile phone microphones.The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and police investigations. Listening devices of the East German security services.Ī covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. ( June 2020) ( Learn how and when to remove this template message) You may improve this article, discuss the issue on the talk page, or create a new article, as appropriate. ![]() The examples and perspective in this article deal primarily with the United Kingdom and do not represent a worldwide view of the subject. ![]()
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