A.F.
Babies are new to everything in the world. He's still taking it ALL in. Give him a little more time, you won't be able to get him to pay attention to anything BUT you. As long as he's responding to louder sounds, he should be fine. Though that doesn't mean that you should make real loud sounds all the time to get his attention.... then he really might have a hearing problem. LOL! Just hang in there.