n.头戴式耳机；听筒；眼睛脚
The earpiece and microphone should not be less than 4lbs. 耳塞和麦克风端不可小于4磅。
He used a computer that read into his earpiece while he was typing. 他打字时，通过计算机可以将打印的内容读到听筒里。
