listening device


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.

listening device

A speech amplifier that aids the hearing-impaired in direct person-to-person communication or telephone conversation. Such devices differ from conventional hearing aids in that they reduce interference from background noises.
See also: device
References in periodicals archive ?
In other words, anyone placing a listening device would be doing so in vain.
These listening devices are self contained, free-standing, and can be placed in a room where discovery would be unlikely yet close to where conversations take place.
There are a wide range of listening devices from long-range microphones to frequency-hopping transmission systems to digital devices - but these can all be detected.
Kidman said she felt "deeply disturbed" by the discovery of the listening device.
The decibel levels of portable listening devices vary.
All of our directional drill crews are required to have a listening device in use whenever there are any sewers within their work areas," says Anderson.
And the Secret Listener might look like a CD player, but it's really a listening device.
It seems like science fiction or something from Mission: Impossible: put your finger in a device for a scan, show your face to a camera, peer into a box that reads your retina, or recite your name to a listening device, and doors--both physical and virtual--open to you.
His next assignment is to place a listening device on the Chinese ambassador who is scheduled to give a speech in New York about an impending American/Chinese trade agreement.
The builder of a remote-controlled surreptitious listening device first needs to equip the computer with sound capability or a sound card and microphone.