Babies are born with all the neurons they will ever need to detect sound patterns in speech. (fullcupplaytherapy.com)
Why not make some noise then and allow your kid to make sounds himself and explore different sound patterns? (welcomeparenthood.com)
I managed to separate the call of one animal, no idea what it was and by listening carefully I was able to distinguish about 5 very similar but different sound patterns. (tacogirl.com)