Keep quite. Neighbor complaint
I hate neighbors...One night my neighbor across the street comes out screaming and throwing rocks at my car because it was too loud (granted it is loud, but thats out of control), so I called the cops on him. Needless to say we don't speak anymore and I love making noise to piss him off whenever possible. In Sunnyvale you are allowed to make all the noise you want until 9:00 or 10:00 pm, I would imagine San Jose is similar.