Как по Английски будет telefoonhoorn

noun

An electrical device worn on the ear to receive radio or telephone communications or to listen to a radio, mp3 player, etc.

Примеры использования:

These day's bookmakers tend to use radio communication and earphones to keep things secret, so it's…

noun

The part of a phone, radio receiver, or other aural device that is applied to the ear during use.

Примеры использования:

And when riders do get away, the others hear all about it in their radio earpieces.