When the 737 MAX took flight above the open fields of Glasgow, Mont., last month, Boeing engineers and technicians were all ears. That's because they were listening to and recording every decibel of sound through microphones to certify that the MAX meets federal and international noise regulations. The new 737 MAX is designed to be 40% quieter than today's 737. Learn more here: http://www.boeing.com/commercial/737max/creating-the-737-max/
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