Ds, 3.5, is always loud. Talks loud, plays loud. Whenever hew wants to tell me something, he is yelling. Playing with his toys, he is screeching. Now, I have to say that my hearing is very good and I probably don't tolerate it as a regular person would, it probably sounds louder to me than it actually is.
I try not to yell much, but I do raise my voice if he isn't listening to me, and I explain it like this:"Mommy doesn't like to yell, but if you don't answer me, I have to talk louder so you can hear me."
When he is speaking to me, I am usually hanging on everyword, as he is fascinating. When he is loud I say "honey, I am listening to you, do you feel like I am not do you feel like you have to yell so I will listen?" He usually says no, but I don't know why he does this.
BTW- dh grew up in a family w 8 kids, they are all very loud, but I always thought they had to be to be heard. Is it possible that it's inherited?