And I do want to just reiterate that the harassment angle is really what you want to play up with the police.

I don’t know the specifics of how policing and such works in your area, but there’s a pretty big difference between “my neighborhood is an inconsiderate jerk who plays his music too loud” and “my neighbor is intentionally targeting me with loud music and sirens to disturb our sleep”

The first one is a noise complaint, that’s low priority for the police and depending on where you are maybe not even a police issue but something like code enforcement.

The second one is a police issue, it’s harassment. This will vary from one jurisdiction to another, but where I work depending on some of the details I might enter that as “suspicious activity” or even a “disturbance” (basically a fight) which should get police there with some urgency.

And some of the other things you’ve said, like him walking around outside with a frying pan, I could definitely make an argument for putting in those calls as a “wellbeing check” or “suspicious person,” and if he’s acting particularly threatening maybe even “armed subject,” or possibly as a psych emergency to also send EMS to hopefully get him taken to a hospital for a psych eval.