We're all aware that many cities have good anti‑noise provisions in their ordinances or by‑laws, but devote little or no effort toward prioritising enforcement. My City of Coos Bay, Oregon, has a nuisance ordinance which goes so far as to outlaw bells worn around an animal's neck (Ordinance #100, or item 9.20.010‑11, available on‑line through http://www.amlegal.com/library).
One day, after enduring several passing "boom cars", I inquired at City Hall whether a person needs a permit to drive around neighbourhoods with loudspeakers blaring "Vote Ron Johnson for Mayor!"—or some such. After checking the archives and calling me back, the answer was "yes, per ordinance 100," but the woman I spoke to couldn't recall ever being asked to issue such a permit. That ordinance requires a time-limited permit for anything that meets a very broad definition of a "sound truck," which clearly includes "boom cars," and you have to have a good reason to apply.
A search of American Legal Publishing's Code Library brought up 245 hits for similar language in the communities it catalogues throughout 32 states.
However, instead of me vainly calling out, "Officer, do your duty!" here in Coos Bay, and then coming out on the losing end of a protracted battle, I am proposing a much broader approach—to noise awareness groups like "Right to Quiet."
Create a forum, newsworthy enough to have a noticeable "presence" both on the Internet and as an entity referenced by reporters and columnists (who are always hungry for easy sources of politically safe controversy and "issues"). The forum lists and ceremonially awards communities that are effective at maintaining quiet in their residential and retail business areas. Ideally, we would want to only give awards, and completely avoid giving other communities "black marks".
This would require "feeding" news of editorial and talk-show types to media outlets, with our statistics and our issues—being ever so scrupulous that what's supplied will stand up to scrutiny and criticism. A thoughtfully organised effort would be based on simple, easily and uniformly observed criteria of zoning, practical ordinances, objective results, and pro‑active enforcement (i.e. on police inititaive, not on a "your-neighbour-complained-again" basis).