Remote (extension) microphone: A microphone specifically intended to pick up the desired sound and enable it to be broadcast to an assistive listening system, personal listener, or hearing device.
For speech applications, the microphone needs to be located close to the talker to minimize the pick-up noise and reverberation.
Remote microphones may be active devices and incorporate speech processing technology, such as acoustic noise cancellation, to enhance the intelligibility of the speech signal.
The photo is a proprietary remote microphone for a cochlear implant. It can be clipped on a person’s clothing or worn on a short lanyard. Photo credit: Cochlear brand Mini Mic 2.