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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 ...
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 ...
Wire recording, also known as magnetic wire recording, was the first magnetic recording technology, an analog type of audio storage. It recorded sound signals on a thin steel wire using varying levels of magnetization. [ 1][ 2] The first crude magnetic recorder was invented in 1898 by Valdemar Poulsen. The first magnetic recorder to be made ...
You can use the DS218+ as a home backup device, a media streamer, a mail server, a website-hosting device, a BitTorrent box, or a video-surveillance recorder—nearly anything you can do with a ...
The Tula is different: it's a surprisingly flexible portable recorder that promises quality audio and clever features for $199. The first thing you'll notice about the Tula is its design -- while ...
The Sony ICD-UX533 is a compact, capable and easy-to-use audio recorder that provides crisp, clear audio in everyday recording situations. $100 Sony ICD-UX533 is our main pick due to its excellent ...
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