During pregnancy, many mothers find that the baby may kick or jump in response to loud noises and may quiet with soft, soothing music. Babies with normal hearing should startle in response to loud sounds. These babies will also pay quiet attention to the mother's or father's voice. And they will briefly stop moving when sound at a conversational level is begun. Hearing is fully developed in newborns. Newborns seem to prefer a higher-pitched voice (the mother's) to a low sounding voice (males).
They can also tune out loud noises after hearing them several times.