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DUBLIN (Reuters) - A new generation of barely- audible, fuel-efficient passenger aircraft described as "flying wings" with "virtual windows" could arrive in two decades, engineers from Britain's Cambridge University said on Friday.
"The noise level we're looking for would be to take it below the background noise that people experience outside airports ... below traffic noise levels," said Paul Collins, a mechanical engineer with the "Silent Aircraft Initiative."
It will be 20 years or more before the concept, which looks more like the U.S. military's B-2 Stealth Bomber than a jumbo jet, could enter service.