Definition
An electroacoustic device that converts sound waves, typically the human voice, into a varying electrical signal that can be transmitted by a radio or recorded. In aviation use, the microphone is the input device a pilot speaks into to transmit on the aircraft radio or intercom.
Plain English
The part you talk into so your voice can be sent over the radio or heard through the intercom.
Context Anchor
Pilots use a microphone in a headset, a hand-held mic, or another cockpit voice input when talking to air traffic control, other aircraft, or people in the same aircraft.
Derivation
From the Greek 'mikros' meaning small and 'phone' meaning sound or voice. Literally a 'small sound' device, originally coined for instruments that picked up faint sounds and made them transmittable.
Why Pilots Care
Clear radio communication with air traffic control and other aircraft is essential for flight safety and coordination.
Intuition Check
A microphone does not send radio messages by itself; it only picks up your voice. The radio or intercom carries that voice to the listener.
Example Sentence 1
Before takeoff, the pilot pressed the push-to-talk switch and spoke into the microphone to request clearance.
Example Sentence 2
Position the microphone close to your mouth to ensure clear transmissions during busy airspace operations.