Definition
Microphones built into an aviator's oxygen mask, allowing the pilot to transmit on the radio and use the intercom while the mask is sealed over the face. They are used during high-altitude flight, smoke or fume events, and any operation that requires the pilot to keep an oxygen mask on while still communicating.
Plain English
A microphone built right into the oxygen mask, so the pilot can keep the mask on and still talk on the radio.
Context Anchor
Encountered in oxygen equipment checks, high-altitude training, and cockpit procedures where a pilot may need to communicate while using an oxygen mask.
Why Pilots Care
They keep communication open during oxygen mask use, which is essential for crew coordination and ATC contact in emergencies.
Grounding Statement
When the oxygen mask is on, the normal headset microphone may not pick up the pilot’s voice clearly, so the mask microphone becomes the speaking path.
Intuition Check
Do not read “mask microphone” as a microphone that hides or blocks sound. Here it means a microphone used with a face mask, usually an oxygen mask.
Example Sentence 1
After the cabin lost pressure, the crew donned their oxygen masks and switched to the mask microphones to call ATC.
Example Sentence 2
During the rapid decompression drill, both crew members verified that their mask microphones were functioning before continuing the descent.