No matter what age your baby is you should be talking, talking, talking - when he is awake and interested in a "conversation. "
When baby is a newborn keep your voice soft and soothing, always keeping in mind your baby's need for feeling secure.
When baby starts oohing and aahing, it is time for you to start responding! Get a conversation going. For example if you are in the kitchen and he begins to babble, say “Yes, Mama is making dinner. Are you hungry?” Then wait to see if there is a response.
Talk and teach your child. Offer pauses so your child has a chance to respond. Be sure to ask questions in addition to making statements so your infant hears the sounds, intonation, and general patterns of language and conversation.