Exhaust Muffle Rear

What are the noise ordinance laws in Ohio?
So I just got a truck with 3" exhaust that is dumped at the rear axle, it is a very loud truck and technically it is muffled but what are the time periods at which I can get cited? I have been told that during the day I can get pulled over but not written up because it's still muffled but after a certain time period like 9PM they can write me up for noise ordinance. If that is true then what time does it end in the morning?
No.
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