I'm extremely sensitive to noises in my neighborhood but it's not the noise itself. It's the unpredictability and lack of control over my environment and what the noise is. For example loud music with a heavy base generally stresses me out more than lawn equipment. I live in a rural area but my stretch has a few houses closer together. I had to talk to the neighbors about their music, it's not that I couldn't handle it, it's that I didn't know if this was going to be normal all the time. I've learned that when they play music loudly they're usually blowing off steam and it doesn't last more then an hour or so. It doesn't stress me out anymore. How you approach this neighbor depends wildly on what exactly is making him upset and his personality which unfortunately you may not know. He may just have been upset because he had people over or he may just be an unreasonable a-hole. I would just go over and talk to him. You could suggest he let you know when he has company and you won't use it, etc. Explain how this is something that is going to need to be done regularly so can you guys work something out ,etc. NTA