For travelers who need one more 90-decibel TSA reminder that unattended bags may be confiscated and destroyed, Denver International Airport won’t disappoint.

But DIA officials just implemented a mandatory Quiet Airport Policy targeting the noises they can control — a push to contain the often-overwhelming cacophony of modern air travel and give people peace and tranquility.

They have reprogrammed 200 microphone stations in concourses, installed noise sensors in loudspeakers, and instructed airlines to find alternatives to concourse-wide broadcasts, such as smartphone text messages and digital signs. Public address announcements that must be made “should be kept as brief and clear as possible.” Airlines are encouraged to text or call passengers privately when left-behind items are loc

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