Main Question or Discussion Point
How is the noise sheilding provided by the fuselage when the engines are mounted at the rear end of the aircraft ? for example-SAX 40
But again, the SAX-40 is not designed with cabin noise in mind, it is designed with external noise pollution in mind. Rear engines have repercussions when it comes to cabin noise, so I think it is fairly plain to see that the folks at MIT and Cambridge who came up with the SAX-40 didn't have cabin noise in mind when designing it. The rear, above-the-body position has a marked advantage when it comes to ground noise.The location of the engines does play a part in how much noise there is.
Noise levels at different parts of the aircraft will vary depending on engine location.