hello all. my baby is about to be 3 months and he is a premmie. He is not interested in rattle sounds of any kind. he is attracted only to male voice( my father's and husband's voice) than mine or my mom's. what can I do to make my baby to listen my words. I mean not to obey just turning his head if he listens my voice. he is able to identify me if he sees me. But not by hearing my voice. please help.