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 A device that converts electric signals, as from a telephone, stereo, or radio receiver, to audible sound and fits over or in the ear.
耳塞电话接收器或助听器上嵌入耳中或附著在耳上的部分 A part, as of a telephone receiver or hearing aid, that fits in or is held next to the ear.