The technology to make quiet helicopters has been around for a long time.[0] Unfortunately its military utility seems to have prevented it from being apllied in

The technology to make quiet helicopters has been around for a long time.[0] Unfortunately its military utility seems to have prevented it from being apllied in commercial aviation until recently. That said, the commercial sector is making progress.[1] If NYC implemented some sort of noise reduction regime and/or retrofit program it would help. Whatever they have now probably isn't aggressive enough. >Each day, hundreds of tourists are recruited off the street, whisked past a light security “wanding,” with no X-ray machine or background check, and loaded onto an idling helicopter with no barrier between passenger and pilot. The author must have taken that scene in The Dictator to heart.[2] Seriously though, doing some invasive TSA-style searches won't help; all bad actors need in that situation is their bodies. The best defense in this case is the instincts of the pilots. [0] https://medium.com/war-is-boring/the-cia-built-a-special-helicopter-to-sneak-into-north-vietnam-b1bb0ea35a7b https://medium.com/war-is-boring/the-cia-built-a-special-hel... [1] http://www.wired.com/2010/02/eurocopter-moves-one-step-closer-to-whisper-mode/ http://www.wired.com/2010/02/eurocopter-moves-one-step-close... [2] https://m.youtube.com/watch?v=JnszgkE3O8g https://m.youtube.com/watch?v=JnszgkE3O8g