a piece of electronic equipment that you put over or in your ears so that you can listen privately to radio, recorded music, etc.

戴在耳朵上的一件电子设备，可以自己听收音机、录制的音乐等;耳机

a pair/set of earphones

一副耳机

戴耳机 put on

摘下耳机 take off

An operator wearing earphone was sitting in the telephone exchange.

戴耳机的接线员正坐在总机室里。