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. a small piece of equipment connected by a wire to a radio, personal stereo etc, which you put in or over your ears so that only you can listen to it
electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear; "it was not the typing but the earphones that she disliked