When you hear, you perceive a noise made by someone or something — like a person’s voice, the song of a bird, or the torturous sound of a ticking clock on a sleepless night.
While hear generally means to perceive a noise, it has several senses, including to listen carefully, as to a story. If you hear from someone, they have contacted you in some way, such as by phone call, email, or even snail mail. A judge will also hear a case when she presides over a trial. And when you hear the news, you’ve gotten information or found something out. But you didn’t hear it from me.