hear of 指听到强调结果，listento指听 强调过程
hear of是听说:
I heard of that man,but I didn't know him.
listen to: 听...后面加上听的内容:
listen to music/the radio
listen是不及物动词,后有宾语时用listen to,都是强调过程.
如:Listen!Who is crying over there?
I often listen to music on Sundays.
hear of听说过...,hear听见,强调结果:
I have never heard of such a funny story.
