I have a similiar problem, only I live in Hawaii, where we are open to the outdoors all the time. I am seperated from my neighbor by a 6 ft high rock wall, but they use their driveway and garage (which opens directly toward my house, as their outdoor recreation area. Their house is also two story. so the re is a another 10' of height on their side. I think the sound is amplified by the walls of the garage (no cars, just bare walls), the concrete floor of the garage and driveway, bouncing off the rock wall, and reverbarating out of the garage echo chamber and the wall above the garage. These are renters, and a construction crew, with plenty of alcohal and foul language. When they are 'partying', there is nowhere in my home that is immune from there noise. What can I do?