How can i make my 2 months old sleep deep ? i guess his hearing is very good that's why even a little noise can wake him up, how can i help him?

Ignoring: Remember that we all have a normal amount of "partial awakenings" that we go through during the phases of sleep. We almost wake up, you and I recognize we are in our bed, with our pillow, and roll over and go back to sleep. Babies have these also. And this is where they learn to sleep on their own and self console. The best you can do for him, is to let him learn how to console himself.