Plain English Meaning

The set of earpieces a pilot wears so they can hear radio calls and other cockpit audio without it being lost in engine and wind noise.

Full Definition

A wearable audio device worn on or over the ears that converts electrical audio signals from aircraft communication and navigation radios into sound, allowing the pilot to hear radio transmissions, navigation aids, and audio alerts privately and clearly in the cockpit.

Context Anchor

Seen in cockpit communication equipment, especially when connecting a headset to the aircraft audio panel or radio system.

Derivation

From 'head' plus 'phone,' where 'phone' comes from the Greek 'phōnē' meaning 'sound' or 'voice.' Literally, a sound device worn on the head.