Silencing Aircraft Engines: New Material Could Reduce Noise To That Of A Hairdryer

If you live near an airport or are a frequent flyer, you may be no stranger to the intense roar of a modern-day aircraft. As the turbines whir into action and force superheated air through the exhaust, sounds as loud as 140 decibels can be heard by nearby onlookers, to the point where noise-reducing earphones are a necessity for visiting airshows to prevent hearing damage. (www.iflscience.com) さらに...