KPLU-FM: Amelia Templeton en Documenting The Sound Of Fallen Trees (And Planes) Researchers at Crater Lake National Park in southern Oregon have spent the past two years documenting the park's natural sound. Often, microphones will pick up the sound of falling trees, elks snacking and coyotes howling.<p>In even the most remote parts of the park, however, researchers are also hearing airplane noise 15 percent of the time.<p>Setting up temporary recording stations in 20 different locations, technicians say that there's virtually no place left in America that's untouched by ambient human noise — and that this may be stressful to wildlife. Sun, 18 Sep 2011 09:32:00 +0000 KPLU-FM: Amelia Templeton 149 at Documenting The Sound Of Fallen Trees (And Planes)