Related milestonesIs not upset by everyday soundsNot StartedReacts to sudden noises or soundsNot StartedNotices toys that make soundsNot StartedListens and responds when spoken toNot StartedBegins to use consonant sounds in babbling, e.g. “da, da, da”Not StartedUses babbling to get attentionNot StartedMakes different kinds of sounds to express feelingsNot Started