Great thread, here is my issue:
About 3 years ago on a Sunday afternoon I hear loud music from the neighbor living kitty corner from me. Loud like you could easily hear it from the street in front of my house. This goes on until 8 to 9 pm and I can't take it anymore. I have a real problem with self centered people who don't give a sh1t about others. I go to the corner of my yard where the 4 properties meet and I stand on the fence and yell at him and tell him to please turn down the music, but not in a nice way. We exchange words and after a few minutes of talking we both cool down and he agrees to turn down the music. He tells me if this is ever a problem again to just come over and let him know.
Turns out the house was given to him by his father in law. Total vato, but older around 50ish, covered in ink.
That was it until 2 summers ago when he started playing music again every weekend for hours at a time. Super loud, not just relaxing in the backyard music, but high school kid loud +1.
After about 3 straight weekends of this one day I had enough. I lost my temper and proceeded to tell him he has no respect for anyone else but himself and I don't understand why he can't keep it at a reasonable level.
So since then I have called the cops about 5 times for said music. Each time they turn it down but it is a constant problem, especially in the summer. The cops aren't much help either, even though the City code specifically states that no one shall make any noise or sound that is unreasonably loud or disturbing to neighbors. I have spoken with some of my neighbors and they also don't like it but they are scared to say anything to him or ask him to turn it down.
I have thought about building an amplifier with a horn on a 10ft pole directed at his house and blasting 3kHz tone towards his direction every time he turns up his music, but that is taking it to another level and i am not sure I want to go there.
First step is get your community relations officer involved. Explain the issue. He will go in person and speak directly to the guy. Usually this is pretty effective if your CR officer knows how to be effective.
If that doesn't work, there's a history of phone calls so you and your neighbors file a formal noise complaint. Just print the form and get their signatures. if you want to make some video recordings of the noise to submit that's good too. Use a decibel meter as a bonus. The city will open a case, and when the cops start going to his house for noise he AND his landlord will start getting fines. And the fines are not cheap.