Summary: The noise of flying machines can be a source of joy or annoyance. Let's have a look at what makes that noise and how much progress has been made over the years!<br> <br> The F-84F Thunderbirds team<br> <br> <br> <br> The XF-84H 'Thunderscreech'!<br> <br> <br> <br> The Boeing Dash 80, prototype of the B707<br> <br> <br> <br> Noise creating vortices coming from an airliner's flaps<br> <br> <br> <br> The Bypass section of a RR Trent<br> <br> <br> <br> A possible Airbus blended body design<br> <br> <br> <br> An APU exhaust<br> <br> <br> <br> The Gyrodyne Rotorcycle<br> <br> <br> <br> Images are displayed under Creative Commons licence with thanks to Dreamstime.com - Airbus, the USAF, Boeing Dreamscape, David Monniaux and the US DOD.
