DD is 3 months old and she doesn't turn her head when i talk to her and if i yell from across the room or anything she usually doesn't do anything or look over When i sing to her she smiles A LOT but for all i know it can be me smiling that she is reacting to. When i slam a door she jumps and she passed her hearing test at the hospital. If I shake keys near her she will track the keys with her eyes and I think with her ears too ...but I could literally yell very loudly and she often won't move nor will she look towards me. I hope her hearing is ok....?? Whenever she sees me she immediately smiles but now i am getting concerned. Why won't she turn her head towards me when I talk to her?

Also- she is cooing a lot and sometimes it seems like she is cooing as a reaction to my singing...