I left the sound of a car driving by for context – the noise becomes louder and more audible at about 27 seconds into the recording. I just think that the fact that it registers at … The noise ordinance that DPD enforces is an objective standard, so hearing an unusual noise doesn't always mean it's a noise violation. Neighbors can report a potential violation … I always figured it was just the train moving rail cars around down on W. Marginal. Comment by Aaron — 1:07 pm … …

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Is 'the hum' industrial noise? Many reports, few complaints – so far