China Airlines 中華航空 - Actually, airplanes have horns just like cars do. Airplane horns are not used to communicate during the flight, but are used by pilots to call the ground crew
![Embraer on Twitter: "Did you know that planes have a horn? The time has come to debunk the reasoning behind the aircraft horn, and why it exists. Here are the answers – Embraer on Twitter: "Did you know that planes have a horn? The time has come to debunk the reasoning behind the aircraft horn, and why it exists. Here are the answers –](https://pbs.twimg.com/media/DxjIP-AWoAIiJaw.jpg:large)
Embraer on Twitter: "Did you know that planes have a horn? The time has come to debunk the reasoning behind the aircraft horn, and why it exists. Here are the answers –
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