I'm going to take the old couples side on this one because nobody else seems to be getting something. All old people have a significant amount of hearing loss, so if they are bothered by the noise you are being too loud. Also you shouldn't be using loud powertools in a residential area weekly... period, end of story. Also I noticed that she mentioned in one of here comments about a radio. You aren't playing a raido outside are you? Because again, that is unexcusable as nobody wants to hear what you a listening to.
I am very much a supporter of quiet. And btw noise is not people talking, children playing or normal day-to-day stuff. Noise is radio's blairing, loud power tools (routers, belt, sanders, grinders) constantly running or idiots who think it's cute to own a classic car or chopper without a muffler.
I hate to tell you this, but bottom line if old people complain that you are being too loud, you ARE being too loud. By starting this thread, it sounds to me that deep down, you are already aware of it and you needed fellow enthuasists to pat you on the back to make the guilt go away. My suggestion to you would be to move to a location with a larger piece of property, so you can work on your hobbies without disturbing anyone. Oh, and ditch the radio... no excuse for that anywhere.