The M-7/DC Electret Microphone is a noise cancelling type.
Designed to operate in place of carbon and amplified dynamic microphones.
The microphone provides clear crisp voice transmission; while dramatically reducing omni-directional ambient noise.
It will not operate in circuits that don’t supply a DC bias voltage. Most modern aviation communications equipment do supply this required voltage.
If unsure, consult with your radio technical manual or with us.
The Microphone is intended for use with wire booms.