Heddy, those made me laugh.
I have a couple of hens that do crow when they are changing between laying and non laying hormones.

In your case, if the bird is loud enough to be a concern to the neighbours, then there is a good chance it is a rooster. Just from my own experience, my hens are not really loud enough to be a nuisance, but I can hear them from my house.

If the other hens are receptive to her/him and he is managing to mate with them, then it's even more likely.
If you can post a picture we could get a more accurate diagnosis.