|This is a map shows America's quietest places created by the National Park Service. It measures, by decibels, the ambient noise levels across the country.
"That's orders of magnitude quieter than most cities, where noise levels average 50 to 60 decibels, scientists reported here today at the annual meeting of AAAS (which publishes Science). The National Park Service is using the map to identify places where humanmade noise is affecting wildlife—animals such bats and owls, whose ears are up to 20 decibels more sensitive than human ears, for example, are affected by humanmade noise because it drowns out the faint rustles of insects and rodents they need to hunt, they say."
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