hi my baby is 6.5 months old now, baby is active my concern is she responds only sudden sounds when am continously playing any sound she is not responding, she is not responding to her name also is it normal or any problem other milestones are normal roll over from back to tummy and tummy to back, sitting with support, standing with support and she will recognize me, she will smile when we playing, in how many months she will recognize her name.. plz tel me is this normal or not