earpiece

例句：

1. 1.She wears a pair of earphones to listen to music in the car.
   她戴着一副耳机在车里听音乐。
2. 2.The engineer needs to wear earphones while working on the loud machinery.
   工程师需要在嘈杂的机器上工作时戴上耳机。
3. 3. The musician uses earphones to improve his performance.
   这位音乐家使用耳机来提高他的表演水平。