earpiece

US /ˈɪr.piːs/
UK /ˈɪr.piːs/
"earpiece" picture
1.

耳机, 耳塞

a small device that fits into or onto the ear, used for listening to a radio or telephone or for helping people who have difficulty hearing

:
The security guard wore an earpiece to communicate with his team.
保安戴着耳机与他的团队沟通。
She adjusted the earpiece of her headphones.
她调整了耳机的耳塞