I will preface this by saying that I don't have kids (yet), and don't know how noisy boys in particular can be, but this seems excessive to me.
A family has moved next door to me, about two weeks ago, and there are 3 kids, boys. They look about 8 and 9ish, and a toddler. They scream all day, from 7am till about 8pm. I am amazed by the racket, we had a family there before and they were nothing like this. They are outside yelling and screaming then run indoors up the stairs, crashing and banging about, knocking things over, I don't even know what they're up to, honestly. They sound like they're just running wild. All the mum seems to do is yell at them, but makes no difference, it's just continuous noise.
It doesn't help that we both work night shifts, and this is really a big deal. It just seems to be an unreasonable amount of shouting and yelling, but maybe all boys behave this way? They seem really badly behaved to be honest. I'm really thinking of moving house, it's that bad.