Quiet Corporate Jets – The Ultimate Challenge for Aerospace Engineers, What About the Inside?
Not long ago, I was talking with a Beverly Hills CA resident who said they were working to limit the jet traffic at Santa Monica airport to only daytime flights. Airport noise is a common challenge these days as so many suburban and urban areas with their sprawl-like growth has encroached on areas once considered buffer zones.
As real estate becomes more costly, builders get closer and closer to airports. This presents safety issues as well as noise concerns, even if the airport was there first. Let's talk about modern corporate jets and noise, but let's turn this debate inside out, what about those flying inside the aircraft only a few yards from the jet engines? There was an interesting article in Bloomberg “Aerospace Section” on December 16, 2013 titled “Silence Is Golden on Luxury Private Jets,” which stated;
1.) Billionaire owners spare no expense in reducing noise levels
2.) It can actually make a long flight more uncomfortable
On the second point the article explains that when you bring down the hum of the engine noise and noise of interior systems like refrigerators and air-conditioning units, other noises become noticeable, plastic rubbing together, or drum like sounds inside. This is counter-intuitive but makes sense.
Ironically, one of the largest corporate jets in the World carries a passenger who has been highly outspoken against such luxuries, Barack Obama, which many in the corporate aviation sector label as an unbelievable hypocrite with such divisive class warfare talk, especially considering the gentleman also talks about high-tech corporate jobs, which aviation manufacturing certainly is, and something the US is currently by far the best in the world at.
Interestingly enough, there are new strategies for dealing with noise and sleeping in modern high-tech homes, noise cancellation strategies, which work on Bose Principles for cancelling out sound waves made from such things as refrigerators and air-conditioning units – that I would assume aerospace sound engineers are also considering – although I've been unable to confirm it.
Anyone designing modern jet engines for aircraft or other uses is concerned with the noise, and great expense has gone into limiting the noise, ask anyone in the industry, even read some of NASA and the FAA's reports on NextGen for general aviation. The military aircraft designers are also fully engaged from fighters to transport aircraft, and from helicopters to UAVs – less noise means less chance of being heard and targeted by ground fire and shoulder launched (man-pads) SAMs (surface-to-air-missiles).
Also the military wants to protect the ears of the pilots, passengers and ground crew to prevent tinnitus which can lead to brain problems later. It's a serious issue both outside noise and inside noise, so if you want to come up with a game-changing technology, put your mind on this problem. Please consider all this and think on it. Additional Article Citation builder pro builder proand Note: According to the NoiseBusters (trademark) website; “With jet engines emitting from 120 to 150 decibels of noise, airport professionals need the best possible hearing protection.”
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