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 thin disk, especially in a microphone or telephone receiver, that vibrates in response to sound waves to produce electric signals, or that vibrates in response to electric signals to produce sound waves. 膜片，振动板一种薄的圆盘(尤其是在麦克风和电话收话器里那种)响应声波振动产生信号或者响应电信号振动产生声波
