electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear
同义词：earpiece, headphone, phone
earphone详细解释
ear.phone n.（名词）A device that converts electric signals, as from a telephone, stereo, or radio receiver, to audible sound and fits over or in the ear.Also called earpiece 耳机：一种传递电子信号的设备，比如从电话、立体声或广播接收器上传出可听的声音。这种设备嵌到耳朵上或耳朵里也作 earpiece
