Yup, me neither - the little ones can be especially shrill when you think they might not have as much cock-a-doodle-do in them!
And... they will crow at first light, and when it's quiet at 4am it's amazing how far the sound travels, even when they are locked up safely in the house.
A cockerel and one hen would be a problem - the hen would have constant attention and after a little too much loving would lose her feathers on her back / saddle very quickly. Ideally you should think of a cockerel to go with 8-10 hens, even half a dozen or if you are breeding and can move him or the hens around, you would probably use a pair, or a trio - 2 hens to a cockerel but they normally would only be in the pen for a short time or the hens would start to suffer unless he was very gentle, not all cockerels are the same, some are more careful than others.
Most people buy 3 hens. 2 is the minimum for company but 3 is better (in case you lose one) and usually provides you with an egg or 2 every day, enough for the average household.
Hope this is of help!
Tim