In the US, the National Park Service is leading a project to bring a little hush back to the wild. Cathy FitzGerald hears more on a hike with soundscape specialist, Davyd Betchkal, in Denali National Park, Alaska – a 6,000,000 acre wilderness bisected by a single road. Davyd is part of the Natural Sounds Division, a special team within the National Park Service, tasked with preserving the soundscapes of natural habitats.