Comment Turbines are efficient, simple and noise-optional (Score 1) 44
They're not popular by accident. How quiet they are is up to the humans who spec their enclosures. (Ditto with large diesels which are routinely made sufficiently quiet for cruise liners.)
Industrial flue gases were traditionally exhausted by tall stacks whose draught pulled fresh air into the furnace at the base. A more recent reason that's done is to reduce ground-level pollution.
Turbines need not be run open like an engine on an outdoor test stand. That's why Air Force bases have sound suppressors to test engines in and out of airframes. Those "Hush houses" could be much quieter but are mostly located on operating air bases where other, installed engines running in afterburner for takeoff are normal.