1. 耳机
Earphones are a small piece of equipment which you wear over or inside your ears so that you can listen to a radio or cassette recorder without anyone else hearing.

2. (电话)听筒
An earphone is the part of a telephone receiver or other device that you hold up to your ear or put into your ear.

1. electro-acoustic transducer for converting electric signals into sounds
it is held over or inserted into the ear

e.g. it was not the typing but the earphones that she disliked

Synonym: earpieceheadphonephone