she is pretty good and aware of when she is making sounds but yeah, if she gets excited or scared she can vocalize how she feels and not really be aware of it. your son will figure this out too. the only realy annoyance is she wears a hearing aid that is maxed out, not so she can hear, but so she can feel it vibrate if there sound. when it unseals from her ear, it creates a feed back loop and shrieks - she is totally unaware of that happening. the deaf community is pretty awesome overall, you son is going to have a very rich life.
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