Originally Posted by dimmolto
Excellent answer, thank you..... but how would it contribute to noise reduction??
More distance (both in absolute and construction terms) between the pax and the noise source, and there is less vibration being induced into the airframe as the engine is basically hung from the wing on a few bits of metal instead of being contained within the airframe itself.
That is also why aircraft with the engines mounted to the tail are generally noisier than those with the engines in pods under the wings. The airflow that gets "touched" by the engine (both on its way in and on its way out) runs closer to the fuselage, and the engine is of course connected directly to the passenger compartment by means of a stub wing.