How poorly?
Steam whistles? Really? With the example signaling quitting time like that happens in a city that is so moderne that it is undergoing "urban renewal." Where did they plagiarize this one from? It does call out "exhausts" but by neglect excludes motor vehicle exhaust specifically calling out steam engines, stationary ICEs and motorboats. Are steam engines (and whistles) that thick on the ground in Dunwoody? Who wrote this crap and when, exactly, will they be fired? With cause.
If plagiarize you must, and that is what this city does, then why not steal from a good source? It is like this city is a cheater copying answers from the class dunce when they're sitting right beside the curve buster. And who might this curve buster be? That would be Athens Clarke County whose noise ordinance is far better. Notice how subjectivity for both the offended resident and the cop is all but eliminated. Can you measure a distance? Hope so. Can you hear the prohibited noise? Then, based on time of day and day of week this would be a violation. Cuts directly to the heart of the problem: is the noise so loud to the human ear that it constitutes a disturbance?
Another thing we might purloin: ACC has a Public Safety Civilian Oversight Board.