Tonight when I talked to Little Curly up close, "baby, do your little kick so Daddy can feel ya", and just 1 second after he responded with a heavy kick to my ear through Mommy's tummy. Some research say it's more likely the baby to hear Daddy's voice first because of a lower sound frequency. We've proved this to be correct from tonight's experiment. Little Curly was responding to Daddy's Voice!! Woohoo!!!