Definition
A cockpit control unit that lets the pilot select which radios are heard in the headset and speaker, and which radio is used for transmitting. It also routes navigation audio (such as VOR or marker beacon identifiers) to the pilot's ears.
Plain English
The small panel of switches and knobs that decides which radios you can hear and which one you talk on.
Context Anchor
Seen on the instrument panel with communication and navigation equipment, especially when selecting radios or managing headset audio.
Derivation
Audio comes from the Latin audire, meaning 'to hear.' The panel is literally the hearing-control panel of the cockpit — the place where the pilot manages everything that comes through the headset.
Why Pilots Care
Proper use prevents missing critical ATC instructions when multiple frequencies are active simultaneously.
Analogy
It works like a small sound control board: one set of buttons decides what you listen to, and another selection decides where your microphone sends your voice.
Intuition Check
Do not think of the audio panel as just a speaker or a volume knob. Its main job is selecting and routing cockpit sound and microphone output.
Example Sentence 1
Before takeoff, she set the audio panel to listen to both the tower frequency and the ATIS at the same time.
Example Sentence 2
Before takeoff she adjusted the volumes on the audio panel so the COM radios were clear without overpowering each other.