In-Flight Peace and Quiet, thanks to computers

When we think of on-board computers on aircraft we normally think of a small computer in the cockpit that aids the aircraft in GPS navigation or the laptop computer that the pushy businessman in Business Class is using. However there are computers in other places too, places you wouldn't even think of - inside the sides of the aircraft; that is between the cabin wall and the outer shell of the aircraft to measure the vibration caused by the engines and feed it back into a computer that actually matches and thus counteracts propeller-vibration making for a quieter cabin. In other words on-board computers "mirror" the noise that is caused by propeller driven aircraft. So far it has seen very successful use on the Bombardier Dash 8 series of aeroplanes and for Saab Aircraft of Sweden. Visit http://www.ultraquiet.com/ for an interactive demonstration of their leading aircraft technology.