noun · telephone receiver or the part of a phone used for speaking and listening

他轻轻地放下了话筒，结束了通话。

noun · microphone or megaphone used to amplify or record sound

他拿起话筒，开始对台下的观众演讲。

noun · figurative mouthpiece or a person who expresses the views of others

他是该组织在媒体面前的话筒。