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Author: admin | 28.04.2014 | Category: Tinnitus Causes And Treatments

Bonus: Although this technology is a sham for headphones, it’s being tested on a larger, 3-dimensional scale to reduce the noise of aircraft in communities near airports! Jacob has a degree in Aerospace Engineering from Embry Riddle Aeronautical University, and now works for a major defense contractor in sunny Florida, as an aircraft structural analyst. Actually, speaking of earplugs, the latest thing for earbud headphone design seems to be silicone earplugs with holes to admit sound from the headphone speakers. My fiancee can’t stand those kind of earplugs, and I can’t wear them at work because I need to hear when someone sneaks up on me, but I have worn them on an airplane before and they worked pretty well! I’ve been using the Shure passive noise-cancelling headphones for years, and love them.


If there was a deafening sound source, what would happen if you had a speaker cancelling it?
Since sound energy is just the kinetic movement of air (caused by pressure differentials), if an equal and opposite movement of air encounters the incoming sound, the kinetic energy of each source is completely canceled by the other. And yes, due to the spherical propagation of sound waves, you would need a lot of speakers around an airport in order to make it work. Not at all.  Earplugs can literally be bought with the change in your pocket, and do a much better job of creating silence for your ear-holes.
Loudspeakers are set up around the airport that play the off-phase sound waves for the engine noises, and word-on-the-aerospace-street is that, after a lot of optimization, it works really well!


They work really well, and the darn things only cost $20-30 for the top-of-the-line brands. You can even get earbuds that have memory foam earpieces that fit the shape of your ear canal exactly to block out external sounds.



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