so we have always known that Noah was happy and lots of times DH has thought he didnt hear. from what I could tell he did- and the times DH noticed he was fixated on other things. but we were talking abotu it again and tonight it does seem taht Noah DOESNT hear us.... when we picked up from the grandparents (they spent the weekend there) he totally ignored me unles I was right in his face *though he ignored me a bit then too) but since coming home we have tried different things to see if he does hear us and its appearing he doesnt... DH blew a whistle and he didnt even blink! clapped didnt startled etc. should we be worried or is he just not caring abotu noises bc his big brother is so darn loud?