Luckily, you should only have 1 or two roosters for that group, so they won't make a ton of noise. The sound travel really depends on the geographic location. For example, we live on a hill. The neighbor at the bottom can only hear an echo of our rooster. On the other hand, we can hear the neighbors talking to each other if they are outside. Sound will travel up rather than down.
Just a side note that I have been starting to worry about for myself. We bought 12 hens at a time and they will be hitting 2 years old this May. We did not take into consideration what will happen when most of them stop laying. Are you going to be willing to get rid of the entire flock in 4-6 years? That is the average age they will slow with their production. If you do not want to sell them off or dispatch them, what are you going to do with a large group of (basically) useless birds?
Personally, I'm getting really worried about this. My bird are pets and I will soon have 16 hens that are no longer laying (we already have 4 that basically stopped). When I need to redo my flock I think I'm going to get 4 hens every 2-3 years. That will stagger the ages so that by the time the older ones are on their last leg, I will still have layers.
