Transmitter detecting apparatus

An eavesdropping device having a microphone and a transmitter is detected by an apparatus including an antenna, a broad-band detector, a limiter-amplifier, and a loudspeaker. The apparatus establishes a regenerative feedback loop with the eavesdropping device and produces a revealing tone. The limit...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	BELL, JR., ALLAN D
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY JAMMING OF COMMUNICATION SECRET COMMUNICATION TRANSMISSION
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