acoustic monitoring site / long-term acoustical monitoring site / normal voice communications / /
Organization
U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Fort Collins / D. Nelson National Park Service Natural Sounds and Night Skies Division / World Health Organization / National Park Service / Night Skies Division / National Park Service U.S. Department of the Interior Natural Resource Stewardship / U.S. Government / U.S. Department of the Interior / Environmental Protection Agency / /
National Park Service U.S. Department of the Interior Natural Resource Stewardship and Science Herbert Hoover National Historic Site