he s a very active kid. recently has learned how to shriek and loves to do that all day long

he says a lot of OOOs and AAAAs and blows raspberries and stuff but not many consanant sounds coming out of that little mouth .
should i really be concerned ? anyone else s LO still not doing this ? He recently had a hearing test which was almost impossible to get done, in fact the doc couldnt finish, but said he pretty much passed 2/3 of it. He responds to sounds and his name and all so i dont worry too much about his hearing... any thoughts?
Re: LO not really babbling ..