I think this has to do with civil aviation, if it's more of a military discussion, tell me before it get's deleted.
Back in 1994 we had to vote on wiether to convert the then Miramar NAS (now Miramar MCAS) to an airport, the the main arguement against it was the factor of noise. If you've been to San Diego you know we have a crappy airport.
I idea was that airplanes going in and out would create more noise than the daily F-14/F-18 training flights that goes on there. While this makes sense mathematically, I figure it's a misguided thought because during a combat situation nobody complains about the noise, so military planes are louder than airliners.
Basic question: Are the engines on airliners, regardless of regulations, more or less louder than those being put on combat aircraft?