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Invention makes jet engines quieter

Igor Adamovich, left, andMohammad Samimy, with the simulated jet exhaust they use to test plasma actuator technology.
12:00AM
July 2, 2007

With nearly seven million passengers moving through Port Columbus International airport every year, the jarring sound of airplane noise may be painfully familiar. NASA expects U.S. air traffic to double or triple by 2025, a projection that has engineers working hard to silence the roar. Engineers at Ohio State University have applied for a patent on technology called plasma actuators that could reduce jet noise.