What is another word for listening device?
Pronunciation: [lˈɪsənɪŋ dɪvˈa͡ɪs] (IPA) 
A listening device is a piece of equipment used to amplify sound, record voices, and monitor conversations. It is commonly called a bug or wiretap in the spy industry. The term eavesdropping device or bug device is also commonly used. A surveillance device, audio surveillance device, or covert listening device are more technical terms used by law enforcement or intelligence agencies. The industry also refers to it as a wire recorder, audio bug or recording device. Other synonyms include spy gear, spy equipment, and espionage device. Though many of these terms have negative connotations, they are essential tools used for both lawful and unlawful surveillance purposes.
